In this guide
- How we put this guide together
- Great Value SIMs for Young Users
- Smarty: Simplicity and Affordability
- iD Mobile: Rollover Data and Spending Control
- Sky Mobile: Flexible Plans and Data Rollover
- Secure SIM Options for Prioritising your Peace of Mind
- ParentShield: The Child-Specific Network
- EE's Safer SIMs: Dedicated Plans for Under-18s
- Tesco Mobile: Default Child Filters and Capped Contracts
- Entertainment-Focused SIMs for Young People
- Vodafone: Bundled Entertainment and Flexibility
- VOXI: Unlimited Social, Video, and Music
- Essential Factors for Choosing Your Child's SIM
- Spending Caps and Budgeting
- Parental Controls and Content Filtering
- Understanding Data Usage
- Pay Monthly versus Pay As You Go
- Contract Length
- Data Rollover
- Family Plans
- Conclusion
- Editorial Policy
Choosing the right SIM-only deal for a child or teenager requires careful thought. Their needs are often very different from an adult's, and finding the right balance between cost, safety, and flexibility is not always straightforward. This guide covers the providers most relevant to families, with current plan pricing, parental control features, and network terms checked against each provider's published information.
We have grouped our recommendations into three categories: value-focused SIMs for families on a budget, safety-focused SIMs with built-in parental controls, and entertainment-focused SIMs for older teenagers who stream and use social media heavily.
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Reviewed by: Phil Brown, founder of SIM Only Finder. Phil previously worked in UK mobile retail at Three UK, advising customers on SIM plans, contracts, and network choices. He has spent over a decade running consumer comparison platforms and reviews networks and SIM-only deals based on that hands-on industry background. About the author
Last reviewed: April 2026. Updated regularly to reflect current plan pricing, network changes, and parental control features.
How we put this guide together
To put this guide together, we reviewed the parental control features, spending caps, content filtering options, and pricing available from each network, checking plan terms and safety features directly against each provider's published information. Where relevant, we have drawn on our own experience of testing SIM-only deals and advising families on suitable plans. Coverage reliability assessments reference the most recent RootMetrics UK RootScore Report and Ofcom Connected Nations data.
Great Value SIMs for Young Users
Value is often the first consideration when choosing a SIM for a child. The providers in this section offer competitive pricing and flexible terms, making them practical options for families who want to keep costs low without giving up essential features.
Smarty: Simplicity and Affordability
Smarty runs on the Three network, which covers around 99% of the UK population on 4G, and includes Wi-Fi Calling and 5G at no extra cost where available. All plans are 30-day rolling contracts with no credit check, making them straightforward to set up and cancel at any time.
Smarty also offers data discount plans on its smaller allowances (1GB, 2GB, and 3GB), which refund unused data at the end of each month. A base charge of £5 applies, covering unlimited calls and texts, with refunds calculated per megabyte. For children with light or unpredictable usage, this means you pay closer to what is actually used rather than a flat rate for data that goes unused.
Smarty does not offer network-level parental controls or content filtering. Parents would need to set up device-level controls (such as Google Family Link or Apple Screen Time) separately. If data runs out, access stops until the next billing cycle or an add-on is purchased, which prevents unexpected charges.
Best for: families who want a low-cost, flexible SIM with no contract commitment and the option to pay only for data used on smaller plans.
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iD Mobile: Rollover Data and Spending Control
iD Mobile uses the Three network and is a practical choice for a child's SIM plan, particularly because of its data rollover feature. Any unused data at the end of the month automatically carries over to the next month, giving a second chance to use it. Rolled-over data is used first and expires if not used within that following month.
All iD Mobile plans include bill capping as standard. This puts a limit on out-of-plan charges, so even if a child uses more than their allowance, spending cannot exceed the cap you set. Content filtering can be enabled through the iD Mobile app or online account, restricting access to adult content while on the mobile network.
Best for: families who want bill protection and data rollover built in as standard, without needing to configure anything manually.
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Sky Mobile: Flexible Plans and Data Rollover
Sky Mobile runs on the O2 network and offers useful flexibility for families. Its data rollover feature allows unused data to accumulate for up to one year, and that rolled-over data can be shared among family members on the same account. For households with more than one child on Sky Mobile, this can reduce the overall cost of keeping everyone connected.
Plans are available on 12-month terms, and allowances can be adjusted up or down during the contract if your child's needs change. Sky Mobile offers optional parental controls and spending caps, which can be managed through the account settings.
Sky Mobile increased most plan prices by £1.50 per month from February 2026. Unlike most providers, Sky does not use inflation-linked annual rises, but prices are variable and can change during a contract. Customers notified of a rise can leave penalty-free within 30 days of notification. For more detail on how annual increases work across networks, see our guide to mid-contract price rises.
Best for: families with more than one child on Sky Mobile who benefit from sharing rolled-over data across the account.
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Secure SIM Options for Prioritising your Peace of Mind
For many parents, safety features and spending controls are the most important factors when choosing a SIM. The providers in this section offer built-in parental controls that go beyond what is available on a standard SIM plan.
ParentShield: The Child-Specific Network
ParentShield is a mobile network designed exclusively for children and is suitable for any age, with controls that can be adjusted from fully restricted to largely open as the child grows. It offers two SIM types. The standard SIM connects to the EE network, which has the widest 4G coverage in the UK. The Roaming SIM connects to all four UK networks (EE, Three, Vodafone, and O2), automatically selecting the strongest available signal in any location.
All anonymous calls are blocked by default. "Home numbers" can be called or texted even when the available minutes or texts have run out, acting as an emergency contact feature. All calls and texts can be recorded for parental review, and alerts are sent for concerning messages or new contacts. Time controls allow you to set when the phone can be used, while emergency services and home numbers remain accessible at all times.
Plans start from £5.99 per month (Safe Stage 1). ParentShield is more expensive than mainstream alternatives for comparable data allowances. However, no other UK network offers the same depth of child-specific monitoring and control features.
Best for: parents of younger children who want the most comprehensive set of monitoring and control features available from any UK mobile provider.
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EE's Safer SIMs: Dedicated Plans for Under-18s
EE is currently the only major UK network to offer dedicated under-18 plans with built-in content controls that cannot be removed. These Safer SIMs are available in three tiers, each designed for a different stage of a child's development.
The Protected plan (£9 per month) includes strict content controls and speeds capped at 0.5Mbps, providing enough connectivity for maps, messaging, and location sharing without enabling heavy streaming. This tier is designed for a child's first phone.
The Guided plan (£12 per month) includes 3GB of data at up to 10Mbps with moderate content controls. Social networking sites such as Instagram and Snapchat are accessible on this tier, making it suited to early teenage use.
The Trusted plan (£15 per month) includes 10GB of data at up to 100Mbps with moderate content controls. This tier suits older teenagers who need more data for schoolwork and general browsing.
A Pay As You Go Guided plan is also available at £9 per month with 500 minutes, 500 texts, and 2GB of data at up to 25Mbps. All plans include Stay Connected Data, which provides basic low-speed access (0.5Mbps) if the data allowance runs out, ensuring the child can still message and share their location. Scam call labelling and spending controls are built into every plan and cannot be turned off.
EE increases pay monthly SIM prices by £2.50 per month on 31 March each year. Pay As You Go Safer SIMs are not affected by annual price rises.
Best for: parents who want network-level safety controls that cannot be bypassed, with tiered plans that grow with the child.
Tesco Mobile: Default Child Filters and Capped Contracts
Tesco Mobile runs on the O2 network, providing wide UK coverage on 4G. By default, all Tesco Mobile SIMs restrict access to content rated 18 and above. This setting can only be removed by verifying age using a credit card, which means a child cannot override the filter themselves.
Content filtering can also be tightened further to restrict content rated 12 and above, which is useful for younger children. These controls work while the device is connected to the mobile network but do not apply on Wi-Fi, so device-level controls should also be set up.
Tesco Mobile offers spending caps that can be set during purchase or adjusted at any time through the account. For families managing multiple SIMs, Tesco Mobile provides Family Perks: with two or more pay monthly contracts on one account, each line can choose a free monthly perk such as extra data, money off the bill, or additional Clubcard points. The value of each perk scales with the monthly tariff price, and perks can be changed each month.
Tesco Mobile does not apply inflation-linked mid-contract price rises. The price agreed at sign-up remains fixed for the duration of the contract, which removes the risk of unexpected cost increases that affect most other providers.
Best for: families who want content filtering active from day one, predictable pricing with no mid-contract rises, and the option to manage multiple SIMs with free monthly perks on one account.
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Entertainment-Focused SIMs for Young People
For older children and teenagers who use their phones primarily for streaming and social media, certain SIM plans offer features that reduce data consumption on popular apps. These options suit families where the child is likely to use significant amounts of data on entertainment.
Vodafone: Bundled Entertainment and Flexibility
Vodafone offers Entertainment plans on 12-month and 24-month SIM-only contracts, which include a choice of subscription. Current options include Disney+ Premium, Amazon Prime, or YouTube Premium, depending on the plan. Streaming content through these subscriptions does not reduce the core data allowance. For families who prefer their child to have less screen time, standard plans without entertainment bundles are available at a lower cost.
Vodafone also offers unlimited data plans and 30-day rolling SIMs for those who prefer no long-term commitment. Entertainment subscriptions are not available on 30-day plans. Optional spending caps and content filtering features are available through the Vodafone account settings.
Vodafone increases pay monthly SIM and airtime prices by £2.50 per month on 1 April each year. This does not affect device plans or Pay As You Go.
Best for: teenagers who would make use of a bundled entertainment subscription and want access to Vodafone's wide 4G and growing 5G coverage.
VOXI: Unlimited Social, Video, and Music
VOXI runs on the Vodafone network and includes 5G at no extra cost. All VOXI plans include Unlimited Social Media, which covers Snapchat, Instagram, TikTok, WhatsApp, Facebook, Twitter, Pinterest, and Facebook Messenger. Usage of these apps does not count towards the monthly data allowance.
Plans from £12 per month add Unlimited Music, covering Spotify, Apple Music, Amazon Music, and others. Plans from £15 per month add Unlimited Video, covering YouTube, Netflix, Amazon Prime Video, and others. For teenagers whose data usage is dominated by social media and streaming, these zero-rated allowances can significantly reduce the amount of general data needed.
VOXI does not offer network-level parental controls. Parents would need to set up device-level controls separately. If data runs out, a top-up add-on must be purchased or the plan must refresh before general data access resumes. All plans are 30-day rolling with no annual price rise mechanism. EU roaming is not included and requires a Roaming Pass from £2.25 per day.
Best for: teenagers who spend most of their data time on social media and streaming apps, where VOXI's zero-rated allowances can significantly reduce the general data needed.
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Essential Factors for Choosing Your Child's SIM
Selecting the right SIM-only deal for a child goes beyond finding the lowest price. The following considerations will help you find a plan that balances affordability with the safety features and data limits that suit your family.
Spending Caps and Budgeting
A spending cap is one of the most important features to look for. Setting a maximum spend limit prevents a child from accidentally running up charges beyond their monthly allowance. Some networks, such as iD Mobile, include bill capping on all plans by default. Others require you to activate it manually, and a small number of providers do not offer this option at all. Check the terms before committing.
Parental Controls and Content Filtering
For younger children, parental controls at the network level are worth prioritising. Tesco Mobile blocks adult content by default, and EE Safer SIMs include controls that cannot be turned off. ParentShield goes further with call and text recording, contact monitoring, and time restrictions. Beyond network-level filters, setting up controls within app stores (Google Play Store or Apple App Store) can help prevent in-app purchases and restrict access to age-inappropriate apps.
Understanding Data Usage
If the phone is used primarily for entertainment (streaming YouTube or Netflix) and much of this happens away from home Wi-Fi, a higher data allowance of 15GB or more may be necessary. If the main purpose is staying in touch, 3GB to 4GB is often sufficient for messaging apps like WhatsApp and basic browsing. For very young children who only need emergency call capability, a SIM-only deal with minimal or no data, such as ParentShield's Safe Stage 1, may be appropriate.
Pay Monthly versus Pay As You Go
Pay monthly plans generally offer better value per gigabyte and often include features not available on Pay As You Go. A 30-day pay monthly plan with a spending cap provides similar flexibility and overspend protection to a Pay As You Go SIM. However, Pay As You Go offers total control over spending because the child can only use what has been topped up. The main drawback is the risk of running out of credit and being unable to make calls, and these plans are typically more expensive per unit of usage.
Contract Length
If you want to trial a SIM or are unsure about the right allowances, 30-day flexible SIM deals provide the freedom to adjust or cancel as needed. Longer contracts (12 or 24 months) often offer lower monthly costs. For guidance on how annual price increases work across UK networks, see our guide to mid-contract price rises.
Data Rollover
Not all providers offer data rollover, but it can be useful if a child's usage varies month to month. Sky Mobile allows unused data to be banked for up to one year and shared across family SIMs. iD Mobile rolls unused data over to the following month. Alternatively, Smarty refunds unused data on select plans rather than rolling it over, which suits families who prefer lower bills over accumulated allowances.
Family Plans
If you already manage multiple mobile accounts, exploring family SIM plans is worthwhile. Some networks allow you to add a child's SIM to your existing account, and a few offer discounts or perks for doing so. Bringing multiple SIMs together on one bill simplifies management and can reduce the overall cost compared to buying individual plans from different providers.
Conclusion
The right SIM for a child depends on the balance between cost, safety features, and how the phone will be used. For younger children, ParentShield and EE Safer SIMs offer the strongest built-in protections. For families focused on value, Smarty and iD Mobile keep costs low while still offering useful controls. For teenagers who stream and use social media heavily, VOXI and Vodafone provide data-efficient options that reduce the risk of overspending on data.
Whichever option you choose, setting a spending cap (where available) and checking the provider's content filtering settings before activating the SIM are sensible first steps. For more on how annual price changes work across UK networks, see our guide to mid-contract price rises. To switch your child's number to a new provider, you can request a PAC code by texting PAC to 65075 from the existing SIM.
Editorial Policy
This guide is produced by the SIM Only Finder editorial team to help parents and carers compare child-friendly SIM-only deals across UK networks. Network terms, pricing, and parental control availability are checked regularly and updated to reflect current offers. Always confirm current terms directly with the network before signing up.
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