DealPriceCheckCompare today. Save tomorrow.

SIM-only guide

Best SIM Only Deals for Kids in the UK

Best answer: For a younger child who mainly needs controlled calls, compare a specialist no-data SIM such as ParentShield Safe Stage 1. For a child who needs protected mobile internet, compare the specific EE Safer SIM options. For a teenager who mostly needs an affordable everyday SIM, compare short rolling plans such as Lebara 5GB or Lyca 6GB, but verify the extra-spend controls before buying. The right choice must let your child contact home, work on their usual route and keep optional spending under adult control. A lower advertised price is not proof of safer use.

If you already have a suitable unlocked phone, buying the SIM separately usually avoids paying for another handset. You can start with SIM only deals under £10 or compare 30-day and no-contract options. This guide helps you decide which type of SIM suits your child before you buy. If you want a short-term budget option for an older child, compare the named Lebara 5GB and Lyca 6GB plans below; both have existing DealPriceCheck buying routes. Neither should be mistaken for a specialist parental-control SIM.

Which SIM is best for a child? A quick comparison

Your priorityOptions to compareWhy it may fitMain limitation
A younger child's first calling phoneParentShield Safe Stage 1Calls to two nominated home numbers, limited other calls/texts, no mobile dataNot suitable for live location or app messages away from Wi-Fi; monitoring and privacy terms matter
Built-in restrictions designed for under-18sEE Safer SIMsNetwork-level content controls, blocked premium purchases and, on pay-monthly options, slower Stay Connected DataNot a contact whitelist or location-tracking service; protection differs by plan and does not cover ordinary Wi-Fi
A pay-monthly plan with a configurable £0 out-of-plan capiD MobileThe account holder can set a £0 Bill Cap, and eligible plans have rolloverLine rental and optional add-ons sit outside the cap. Included roaming may still work at £0
A prepaid plan where extra data must be bought on purposeSMARTYPrepaid rolling plans. Mobile data stops when the included data is used unless an add-on is boughtCheck who can access the account and authorise top-ups
A budget SIM with a short termLebara 5GBVodafone network, identified 30-day product with a tracked buying routeA prepaid or rolling price does not prove a £0 cap for every chargeable service
A low introductory cost on EE's networkLyca Mobile 6GBShort renewable deal with a tracked buying routeAn introductory charge can rise at a scheduled renewal, so inspect every payment
EE-network access without a long commitment1pMobile 5GB30-day Boost, no conventional credit check1p/MB beyond the bundle and possible automatic balance top-ups. Not a strict spend cap
An O2-based option with data saved for laterSky Mobile 10GBEligible unused data can be saved in Piggybank, and a spending cap can be setThe linked offer has a 24-month minimum, and extra costs and roaming can apply
Flexibility over data size on a known network5GB, 10GB or 20GB dealsPick an allowance from your child's real usageA larger bundle is not a substitute for safety controls

Start with three questions: Who must the child be able to contact? What happens after the data runs out? Who can authorise extra spending? Then shortlist networks that work on the journey to school, at home and in the places your child visits. Compare the total cost only after those requirements are met. A cheap ordinary SIM can be a sensible choice for a teenager; it does not acquire child-specific protections just because an adult pays the bill.

Which SIM is best for a younger child or a teenager?

It depends on what the phone is for. A ten-year-old carrying a phone for the walk home needs a very different service from a sixteen-year-old using maps, school apps, video calls and social platforms. Age is a guide, and your child's independence and handset matter as much.

SituationSensible starting pointCheck before paying
First phone mainly for calls and texts to familyA child-specific no-data plan, or a tightly controlled low-data planCan home contacts be reached? Do messaging and location apps need data?
Walking to school with location sharingA small data allowance with account-holder controlsIs the signal adequate, and does location sharing work away from Wi-Fi?
First smartphone with restricted appsA Safer SIM or budget SIM plus device-level parental controlsCan adults restrict installs, purchases and content on mobile data and Wi-Fi?
Older teenager, mostly home Wi-FiA 5GB or 6GB rolling dealAre heavy updates and video downloads done on Wi-Fi?
Teenager using social video, maps and calls on the move10GB, 15GB or 20GB first, then adjust from real usageHow fast would a small bundle run out, and is extra use chargeable?
Child who travels abroad oftenA plan with a suitable destination allowance and controlled roaming chargesCould a £0 cap block roaming, and do parental filters still work abroad?

A no-data SIM involves a real trade-off. It keeps ordinary mobile internet switched off, but messaging apps, some location features and video calls may not work away from Wi-Fi. The phone can still reach the internet over Wi-Fi or another device's hotspot, so "no mobile data" does not mean "no internet access".

What is the difference between a spending cap, a prepaid SIM and parental controls?

They solve different problems. The most important check is what actually happens when your child tries to use a service that costs extra.

ProtectionWhat it is designed to doWhat it does not automatically cover
£0 out-of-plan Bill CapBlocks chargeable services outside an eligible monthly planNormal line rental, separately bought add-ons, and some administrative or third-party charges depending on terms
Prepaid allowanceRequires payment for a renewal or extra bundle before you use itPAYG credit use, auto-renewal, permitted chargeable extras, or an account holder buying more data
Network content filteringRestricts certain website categories on a provider's mobile networkEvery social-media app, encrypted content, every Wi-Fi network or every device setting
Device parental controlsManage apps, purchases, websites and screen time where supportedOperator charging rules, premium services, or charges the adult authorises
No-data planRemoves or disables cellular internet on the named productWi-Fi, Bluetooth, another phone's hotspot, or reliable app-based location without connectivity
Family account managementLets an adult administer eligible lines and sometimes share dataMaking every family line free of additional charges

iD Mobile explicitly allows its bill cap to be set at £0 but says line rental and optional extras such as add-ons are not included. A £0 iD cap can still permit use of included roaming allowances in eligible destinations; it blocks chargeable use outside the cap. Sky also offers a monthly spend cap, though a £0 or too-low cap can prevent roaming that requires a paid pass. The same cap amount therefore does not create identical travel behaviour across providers. Set and verify these controls in the adult account.

For predictable spending, prefer a product that stops chargeable use without letting the child authorise new charges, and test this in the adult account after activation. For Lebara and Lyca, the specific linked ordinary offers do not establish a verified £0 out-of-plan cap: ask the provider about premium services, excess data and top-ups. Don't hand over a phone just because the marketing says "budget", "prepaid" or "family".

What are the cheapest SIM only deals for children and teenagers?

A conventional low-cost SIM can be enough for a teenager if it covers the right network, gives enough data and is backed by device controls. The plans below are routes we can compare and, where shown, buy through DealPriceCheck. They are ordinary SIMs, not specialist child-monitoring services.

Is Lebara 5GB a good first SIM for a teenager?

It suits a light user. Our Lebara 5GB 30-day plan gives a short-term buying route on Vodafone's network, and it is a sensible comparison for a teenager who mostly uses home or school Wi-Fi and needs mobile data for messages, maps or the occasional app. The selected 5GB card records a finite number of included UK minutes and texts, not unlimited allowances. Check the displayed quantities and any chargeable, international or premium-number exclusions before buying. A school-age child may seldom exhaust calls, but that is a different risk from running out of data.

A parent can test the signal and real data usage without a two-year phone contract, and a smaller rolling plan is easy to change as needs grow. Before you buy, check how out-of-bundle spending is handled, whether premium services can be blocked and whether the adult registers and controls the account. The linked deal card records 1,000 UK minutes and 1,000 texts, not unlimited use. A short term doesn't prove every possible charge is blocked.

If 5GB is too tight, the Lebara 15GB 30-day plan is a same-network alternative through our existing deal card. Compare the current price difference instead of buying a bigger tier because it sounds safer.

Is Lyca Mobile 6GB cheap enough once the introductory price ends?

Check the next payment first. The Lyca Mobile 6GB offer is an EE-network, renewable SIM with a confirmed DealPriceCheck tracked route. The selected card separates an introductory period from the subsequent recurring price. Multiply the correct rates across the months you actually need rather than treating the first payment as the ongoing price.

It can suit a teenager who is mainly on Wi-Fi and doesn't need a specialist child SIM. Verify every later renewal amount, automatic payment settings, premium-service restrictions, age-appropriate filtering and roaming. Lyca's recorded eSIM availability is a convenience and not a parental-control feature.

Is 1pMobile 5GB safe from excess-data charges?

No, not automatically. The 1pMobile 5GB Boost uses EE's network, includes UK calls and texts in its named package and renews every 30 days without a long fixed commitment. It is reasonable for a responsible older child on a suitable handset, but we wouldn't choose it for a child who must never generate out-of-bundle data charges unless an adult has first confirmed effective restrictions.

The published rate is 1p per MB for UK data beyond the 5GB allowance, so an extra 500MB costs about £5 and an extra 1,000MB about £10. The provider also describes a £10 automatic usage-balance top-up when the balance falls below £2, under its applicable settings and terms. Prepaying for the Boost is not a guaranteed hard stop at 5GB.

If your child genuinely uses more data, compare the 1pMobile 10GB Boost or an alternative with different overage behaviour. The 1pMobile provider page lists other verified offer sizes.

Is Sky Mobile 10GB worth a 24-month commitment for a child?

Only if you expect to keep the line for the full term. Sky Mobile's named 10GB deal uses O2's network. Eligible unused data can go into Sky Piggybank and be used later under its rules, which helps when a child's monthly usage is uneven, and a monthly spend cap can be set for out-of-plan charges.

The trade-off is significant. Our linked 10GB card has a 24-month minimum term, and the adult account holder may need to pass a credit check. The card's displayed minimum-term total assumes its shown base charge, but also warns that monthly charges may increase. Do not take that displayed total as a guaranteed final 24-month cost. Follow the card's View Deal and review the actual Contract Summary, later payment schedule, eligibility and any exit charge. A £0 spend cap can also stop paid roaming.

Sky can suit a parent who values O2 coverage and expects to keep the line for the contracted period. It is a poor first choice if you only want to trial the signal or change plans after a month. Compare Sky Mobile's other contract options if flexibility matters more than this named offer.

Which providers offer the strongest built-in child protections?

Low prices and comprehensive child safety are different products. The options below are built around parental oversight or explicit bill blocking, though none of them has a verified tracked checkout route on DealPriceCheck.

ParentShield: is it the right SIM for a first calling phone?

It suits a young child whose phone is mainly for contacting adults. ParentShield sells child-specific SIMs with permitted home numbers, time restrictions and account-based call and text management. Its Safe Stage 1 option includes unlimited calls to two nominated home numbers, plus 100 ordinary minutes and 100 texts under its published terms, but no mobile data or live location tracking. Other stages can include data. Some ParentShield products use a single host network and others a multi-network arrangement, so do not assume every SIM automatically switches between all UK networks. Check whether the two nominated contacts, other allowance limits and monitoring arrangements suit your family's needs.

This gives meaningful control that an ordinary budget SIM doesn't. The trade-off is that some monitoring features involve recording or reviewing communications, so explain them to your child in an age-appropriate way, and check the privacy terms and whether your child needs app messaging or location sharing away from Wi-Fi.

Compare ParentShield when restricting contacts and preventing unexpected network spending matters more than getting the most gigabytes for the lowest price. If your child needs location sharing away from Wi-Fi, compare its data-enabled stages rather than assuming Safe Stage 1 will provide live tracking.

What are EE Safer SIMs?

EE Safer SIMs are dedicated under-18 products with Strict or Moderate content controls that cannot simply be disabled like an ordinary adult-content filter. EE also blocks specified premium-number and charge-to-bill activity. The exact Safer SIM variant matters: its pay-monthly options include reduced-speed Stay Connected Data, which may keep basic messaging and maps working when the faster allowance ends. The separate Guided pay-as-you-go Safer SIM advertises 500 minutes, 500 texts and 2GB, with strict controls, but no roaming. Do not assume the PAYG plan includes all pay-monthly features or unlimited high-speed data.

This is materially different from a normal EE-hosted SIM such as 1pMobile or Lyca. Sharing EE's radio network doesn't mean sharing EE's Safer SIM restrictions. On EE Safer pay-monthly plans, eligible EU roaming carries a daily charge and needs a spend cap above £0; the Guided PAYG Safer SIM does not support roaming. This is a genuine school-trip purchasing consideration, not a minor extra. Check the exact plan before ordering.

An important distinction for parents: EE Safer SIM's content controls are not a contact whitelist and EE explicitly says these plans do not include a child-location tracking service. They filter on EE mobile data, not ordinary Wi-Fi, and EE warns that a VPN or Apple Private Relay can interfere with filtering. They also cannot inspect all content inside apps. Do not assume unknown callers or messages are automatically blocked. Pair the SIM with device-level controls and discuss unwanted contacts with your child.

Does iD Mobile offer a true £0 spending cap?

For eligible out-of-plan charges, yes. An adult iD Mobile account holder can set a £0 Bill Cap in the app. Under its published rules, that blocks chargeable services outside the included allowance, including extra data after the bundle is used. It does not remove the standard plan charge, purchased add-ons or other excluded fees. Included roaming in an eligible destination can still work with a £0 cap, whereas paid roaming outside the allowance is blocked.

That makes iD a useful non-partner benchmark for parents asking for a SIM only for children with a spending cap. Set the cap to £0 in the adult account, block optional purchases where possible and check the exact SIM's credit and commitment rules. Eligible unused data can also roll over. Keep approval for separately purchased add-ons in the adult account, since a Bill Cap does not block every possible way to spend money.

What happens when a child runs out of data on SMARTY?

Mobile data stops on SMARTY's regular rolling prepaid plans when the included allowance is exhausted. SMARTY's own guidance says an account holder needs to buy a data add-on or wait for renewal; that differs from a SIM that continues deducting credit per MB. This is a data restriction, not a claim that all normal voice calls and texts cease.

This can make a suitable SMARTY plan a straightforward first budget option, provided the adult controls the account and any payment approvals. The downside is that data running out can interrupt maps, messaging or location sharing away from Wi-Fi. A data-warning alert helps, but it doesn't replace having enough data when your child needs it.

SMARTY doesn't offer the specialist call monitoring ParentShield does, so apply the phone's parental controls separately. Check which ordinary calls and texts still work after mobile data stops; app messages and live location are different services.

Does Tesco Mobile still offer Safe Start?

Tesco Mobile's previous Safe Start promotional package has ended, according to its official support page. Do not treat its associated Sway.ly subscription trial as an automatic ongoing benefit of a new ordinary Tesco SIM. Tesco Mobile continues to offer child-focused guidance, content-safety features and spending controls on relevant products; check the product actually being sold rather than relying on an old promotion.

A standard Tesco SIM may still be a sensible O2-network alternative, but check the specific child-related features, spend cap, full contract cost and family eligibility rather than assuming a discontinued campaign applies.

How do you set a £0 spending cap on a child's SIM?

Apply and check the cap in the adult's account before the phone is handed over, and keep the account password and payment approvals under adult control. The exact buttons vary by network.

How do you set a £0 Bill Cap on iD Mobile?

Open the iD Mobile app, go to Bills, select Manage bill cap, enter £0 and save. Confirm the saved amount. The normal monthly payment, separately purchased add-ons and certain other charges fall outside the cap. Check that the saved amount is displayed as £0 in the adult account.

How do you set a spend cap on Sky Mobile?

Sky supports a monthly out-of-plan spend cap plus separate roaming and service-number rules. Set a suitable cap in the adult account, read the exceptions and test which services are blocked. A £0 cap can prevent chargeable roaming, including a daily roaming pass, so plan travel separately instead of loosening the cap without thinking through the risk.

Do prepaid and PAYG SIMs need extra checks?

Yes. Some rolling SIMs require an adult to buy another bundle before extra data works, while others can spend existing PAYG credit or automatically top up a balance. Verify which applies. In particular, 1pMobile's 1p/MB excess-data rule means a 5GB Boost is not equivalent to an iD £0 Bill Cap.

Also look for payments that bypass the SIM operator entirely. A child's app-store purchase may use a bank card, a family payment method or a third-party payment system, and a network cap can't be relied on to block those.

How much mobile data does a child need?

Start with what your child actually does and how much time they spend off Wi-Fi. A data allowance is a monthly or 30-day pool and says nothing about how safe a plan is. This table is a planning guide, not measured usage.

Regular use away from Wi-FiAllowance to compare firstMain risk to watch
Mostly calls and SMS, internet deliberately offNo-data child SIMApps and live location may not work away from Wi-Fi
Messaging, basic maps and occasional browsing1GB–5GBBackground updates or sending media can use extra data
Maps, messaging, some music and light social use5GB–10GBVideo can push a modest bundle over its limit
Daily social video, some streaming and video calls10GB–20GB or moreHigher video quality and hotspot use can raise demand sharply
Heavy video and hotspot use20GB+ after checking recent usageUnlimited plans may cost more and still carry special terms

Where possible, check two or three full usage periods. If usage was 2GB, 3GB and 4GB, a 5GB plan might be enough with a buffer. If it was 7GB, 12GB and 9GB, look into the busy month and compare 10GB with 20GB tariffs. These figures are illustrative and are not UK child-usage statistics.

For a child, think about whether mobile data must remain available for maps and family contact. A hard stop at 5GB controls data overspending but may cut off app-based communication. An eligible slower-data feature or a top-up the adult can deliberately authorise may be better. Ordinary mobile voice calls and SMS are not the same as WhatsApp messages or live-location updates: ask which of those still works when mobile data stops. Our guide to how much mobile data you need covers the full range of allowances, so you don't pay for data that rarely gets used.

What does a cheap teenage SIM cost over a school year?

A three-month introductory price can look attractive, but it shouldn't be compared with another provider's standard price as if both applied for the whole year. These hypothetical plans use 12 monthly payments for a like-for-like illustration.

Example planPayment structureCost of 12 payments
Plan A£3 for 3 months, then £6 for 9 months£63
Plan B£5 for all 12 monthly payments£60
Plan C£7 for all 12 monthly payments£84

Plan A looks cheapest on day one but costs £3 more than Plan B after 12 payments. This is arithmetic showing how promotional steps work, not a quotation for any provider on this page. A real contract may also have upfront charges, known price changes or fees for leaving early.

Watch the billing period too. Twelve 30-day renewals cover only 360 days, so continuous service through a full 365-day year generally needs a 13th payment, though the new period then runs past the anniversary. A calendar-month plan normally has twelve bills a year. Compare the actual dates instead of multiplying the headline price by twelve.

Check the current Lyca 6GB, Lebara 5GB and 1pMobile 5GB cards for real payments, terms and networks. If your child needs 10GB or 15GB, include the cost of excess data in the comparison.

Are family SIM plans cheaper for children?

Sometimes, but not automatically. Grouping all household SIMs with one provider can simplify billing or allow data sharing, yet you may pay for allowances your children don't need. Compare the total household payment against individual low-data plans, including separate contracts on different host networks.

As an illustration, suppose a household pays £20 for an adult plan and can add a child line for a hypothetical £8, making £28 in total. If the same adult could pay £14 on a standalone tariff and the child could use a £5 line, two separate plans would cost £19. The £8 "family discount" doesn't necessarily save money. All figures here are illustrative.

The family SIM only comparison covers group discounts and shared allowances in depth. This page asks a different question: whether one child's SIM has sufficient spending restrictions, suitable access and reliable contact with home. A family discount doesn't answer that.

How do you make a child's iPhone or Android safer before activating the SIM?

A mobile network filter alone is not enough. Ofcom recommends checking that the provider's parental controls are switched on, since they may not be enabled automatically, and you should also set controls on the phone itself for apps, websites, screen time and spending.

  1. Keep billing in an adult's account. Check the provider's minimum age and identity requirements. Your child can use the phone without being the contracting bill payer.
  2. Choose the spending arrangement first. Set a verified £0 extra-spend cap, or pick a product where additional data can't silently incur charges, and restrict who can buy top-ups.
  3. Switch on the provider's child content filter. Confirm it is active on mobile data, and understand what it doesn't filter inside apps or on Wi-Fi.
  4. Set up Apple Screen Time and Family Sharing, or Google Family Link. Use a parent-managed child account and configure age-appropriate app downloads, web restrictions and screen-time limits. Options depend on the device and software version.
  5. Review app-store and game purchases. Require adult approval where supported and check saved payment methods, because a mobile bill cap doesn't necessarily block a purchase charged to a payment card.
  6. Check location-sharing requirements. If you use device-based family location sharing, make sure mobile data, permissions and battery settings allow it to work on the usual route. A network SIM that advertises content filtering does not automatically supply location tracking.
  7. Test mobile and Wi-Fi behaviour separately. Check filtering on mobile data and then on home Wi-Fi; test the effect of any VPN, private relay or custom DNS settings where relevant. Check what happens on public Wi-Fi, on a hotspot and when the data bundle runs out.
  8. Talk about the controls. Explain privacy, messaging with strangers, unwanted contacts and how to reach an adult. The settings support an ongoing conversation and don't replace it.

For impartial guidance, see Ofcom's mobile parental-controls guide. Apple's child-controls instructions and Google Family Link help explain the supported device-level settings.

Which UK network is most reliable on the school run?

The one with the best signal on your child's everyday route: at school where phones are allowed, on the train or bus, indoors at home and in the places they visit. More gigabytes don't help if the network has no signal there.

Use Ofcom's Map Your Mobile to check predicted indoor and outdoor coverage for the relevant postcode and route. These are estimates, so if the phone matters for contact on a regular journey, test the signal before committing to a long-term deal. Practical trial: from safe, ordinary locations on the route, check a standard call and SMS to a parent, then test the child's actual messaging or location app using mobile data rather than Wi-Fi. These can succeed or fail independently. Recheck in the building where the child spends time; an outdoor coverage map cannot promise reception inside.

If you are choosing between the two most accessible tracked routes, compare Lebara's Vodafone-network 5GB with 1pMobile's EE-network 5GB. The network and the overspend rules may matter more than a small price difference.

What happens if your child runs out of data?

It depends on the product, and it is one of the most important questions to ask before you buy.

Example productWhat to check after the included data is usedWhy a parent should care
1pMobile 5GB BoostExtra UK usage can cost 1p/MB from credit, with auto-top-up conditionsData may continue at a charge instead of stopping
SMARTY prepaid planFurther data requires an add-on or the next renewalUnexpected per-MB charges are avoided, but app messaging can stop
iD Mobile with £0 Bill CapChargeable out-of-plan use is blocked under the cap rulesThe standard bill and separately bought extras still exist
Sky MobilePiggybank, Mix, data add-ons and monthly caps each have conditionsThe child may use saved data, but optional charges and term commitments remain
EE Safer SIMSome qualifying products give slower Stay Connected Data after the allowanceCan keep basic connectivity, subject to the plan and coverage
ParentShield no-data planMobile internet is not includedCalls and texts to designated contacts may remain, but app-based location or messaging may not

Before your child starts using the SIM, ask the operator five things. Does data stop at zero? Will credit be deducted? Can the phone automatically top up? Can the child buy another pass? Will essential communication still work without data? The answers may rule out a cheaper-looking plan.

Can your child use their SIM abroad without extra charges?

Not necessarily. Domestic data, roaming access and bill caps don't work the same way. A child's UK allowance may be subject to a much smaller roaming limit, a daily roaming pass or blocked service when the cap is £0.

Sky warns that a £0 monthly spend cap can block chargeable roaming. EE's Guided pay-as-you-go Safer SIM does not support roaming at all, while its pay-monthly Safer plans only offer eligible paid EU roaming within the allowed spend cap. A ParentShield no-data or tightly restricted SIM may also have travel limits. The 1pMobile Boost roaming ceiling for larger packages doesn't turn a 5GB UK bundle into a 14GB roaming package, and our Lyca 6GB card records a smaller European fair-use quota than its UK data amount.

Before a school trip or family holiday, check the named SIM's supported destination, actual roaming data allowance, spend cap and whether the handset will work there. If you want to prevent all unintended roaming charges, arrange it with the adult account holder before travel, even if the child then has to rely on Wi-Fi or another prearranged way to communicate. For a wider comparison, see SIM only deals for EU roaming.

How can a child keep their existing UK mobile number?

Usually the number can move to a new SIM under Ofcom's switching process. The account holder should first check any current minimum-term liability and make sure the new service is set up correctly.

  1. From the current SIM, text INFO to 85075 to check contract or termination information where available.
  2. Text PAC to 65075 to keep the number. If your child wants a new number and no transfer, request a STAC on 75075 instead.
  3. Give the code to the new provider and follow the activation instructions. Keep the old SIM accessible until the switch completes.
  4. After the transfer, test family calls, messages, parental controls, available data, content filtering and billing safeguards on the new line.

A normal single-number switch generally completes within one working day of the new provider receiving a valid code, subject to the provider's cut-off and any exceptions. Don't cancel the old number separately before porting it if your child wants to keep it.

What should you check before buying a SIM for a child?

Use this list as a final check, not to choose by price alone.

  1. Safety: Does your child need contact whitelists or specialist monitoring, or are standard parental controls enough?
  2. Account holder: Who signs the contract, controls the app and approves extra payments?
  3. Spend cap: Does £0 mean no out-of-plan use, or can credit top-ups and optional purchases still happen?
  4. Data cutoff: Can your child still reach home after using all the data? Are calls, SMS and app messages affected differently?
  5. Coverage: Does the host network work on the school journey and indoors at home?
  6. Allowance: Is the size right for real off-Wi-Fi use, with some headroom?
  7. Full cost: What happens after a promotional price ends, and is the plan 30 days, a calendar month or 12–24 months?
  8. Content filtering: Is the operator's filter switched on, and are device-level controls also set up?
  9. Travel: Could a £0 cap block roaming, and are any travel charges or limits understood?
  10. Checkout: Open the named DealPriceCheck offer, then its View Deal button, and verify the final terms before you order.

For a straightforward budget comparison, start with the tracked Lebara 5GB and Lyca 6GB options. For a larger child allowance, compare Lebara 15GB and the 10GB live catalogue. For a child-specific safety product, compare EE Safer SIM and ParentShield's actual restrictions independently, and don't assume a conventional cheap SIM is equivalent.

SIM only deals for kids: frequently asked questions

What is the best SIM card for a child in the UK?

For a younger child who needs controlled calling and minimal mobile internet, compare ParentShield or EE's Safer SIM range. For an older child who needs an affordable standard SIM, choose a suitable rolling plan on a reliable network after setting spending restrictions and device controls. The right choice depends on your child's communication needs, not a permanent price ranking.

How old do you have to be to get a SIM contract in the UK?

Pay-monthly providers generally require an adult account holder, often 18 or older, to agree to the contract and pass applicable checks. A child can use a SIM registered and administered by a parent or guardian, subject to the operator's terms. Check the named product, because prepaid activation and account rules can differ.

Can I get a SIM only for children with a £0 spending cap?

Yes, some operators support it. iD Mobile explicitly permits a £0 out-of-plan Bill Cap, and Sky offers monthly spending caps. A £0 out-of-plan cap is not the same as a £0 monthly bill, because line rental, separate add-ons and other excluded costs may still apply. Confirm the exact product and set the cap in the adult account.

Is prepaid or pay as you go better for kids?

It depends on whether the product really stops chargeable usage. Prepaid rolling plans may limit unexpected data spending by requiring an extra purchase when the bundle runs out, but PAYG credit and automatic top-ups can work differently. Also check who can authorise new purchases and whether essential communication remains available.

Is 1pMobile safe from unexpected charges for children?

Not automatically. Its 5GB Boost has no long minimum term, but data beyond the allowance can be charged at 1p/MB, and the provider publishes automatic usage-balance top-up conditions. Check or restrict these settings before letting a child use the account. Being prepaid doesn't make it a zero-overspend SIM.

Does a SIM card stop children seeing adult content?

Only partly. Network-level content filters can restrict some websites, but they don't reliably control every app, Wi-Fi connection or internet route. Pair a suitable network setting with Apple Screen Time or Google Family Link and age-appropriate supervision. Ofcom advises checking that the operator's controls are switched on.

Can my child still use WhatsApp with a no-data SIM?

A no-data SIM cannot provide WhatsApp's mobile internet connection. On a suitable phone it can work over Wi-Fi or another hotspot, provided your child meets the app's current age and account requirements. Messages and app-based location sharing may stop when the phone leaves Wi-Fi coverage; ordinary network calls and SMS have separate rules.

Is 5GB enough for a child's first smartphone?

It can be when most streaming and downloads happen on Wi-Fi and mobile use is mainly messaging, maps and light browsing. A teenager who watches video every day away from Wi-Fi may need much more. Check real usage and the cost of going over, not just the advertised allowance.

Can I give a teenager my old phone and add a SIM?

Usually, provided the phone is compatible, unlocked for the chosen network and still gets appropriate security updates. Check physical SIM versus eSIM support, battery health, parental account controls and whether the device supports current UK network requirements before you buy a bundle.

Can I keep my child's number when changing providers?

Usually yes. Text PAC to 65075 from the old UK SIM and give the code to the new provider. Check any existing contract charges first, because a parent may need to manage the switch on behalf of the account holder.

Is a family SIM plan always cheaper for a child?

No. A family discount or shared-data feature can help, but separate low-cost SIMs often compete well on price. Compare the whole household payment and each person's real data needs. Our family SIM guide explains the group-cost question separately.

What happens if a child uses all the data on SMARTY?

Mobile data can't continue under the standard allowance until renewal unless more data is bought, according to SMARTY. This helps avoid unintended per-MB charges but can interrupt internet-based family messaging or location sharing away from Wi-Fi. The parent should decide how any add-on is approved.

Are specialist kids' SIMs worth paying more for?

They can be, if parent-managed contacts, restricted use times and child-specific oversight are essential. ParentShield and EE Safer SIMs offer controls you shouldn't assume exist on an ordinary cheap SIM. Check whether the controls work over Wi-Fi, what they record, which calls remain possible and whether the extra monthly cost matches your child's real needs.

Verdict: the right kids' SIM keeps spending and communication under control

For a first phone needing restricted contacts, start by comparing ParentShield Safe Stage 1 against the specific EE Safer SIM variant, and ask whether your child needs live location or app messaging away from Wi-Fi. For an ordinary budget SIM for a responsible older child, use the named Lebara 5GB or Lyca 6GB offer cards and compare the full renewal schedule, coverage and spending safeguards. 1pMobile 5GB offers flexible EE access but is not the right default for a strict no-overage requirement because of per-MB charges and possible auto-top-ups. For a verified £0 out-of-plan cap, iD Mobile is the clearest published benchmark in this comparison even though we do not have a confirmed tracked offer for it. Sky may suit parents happy with a longer O2-based commitment and Piggybank, provided they understand the price and roaming conditions.

A useful final distinction: a SIM can limit spending, filter content or restrict contacts, but those are three separate protections. Check exactly which are included and which depend on the phone. The decisive questions are what still works when mobile data is exhausted, what can still cost money, and whether an adult can control those charges. Configure and test the account before handing over the phone.

DealPriceCheck compares selected UK offers and may earn commission on eligible purchases. Prices, eligibility, product features and safety controls can change; confirm the named offer, account restrictions and checkout terms before ordering.

Related guides