Best SIM-only deals for kids

A child's first phone needs a low monthly price, no chance of a surprise bill, and adult content blocked. These monthly rolling plans are all £10 or less.

Prices last checked 25 September 2026

What to look for

No surprise bills. Plans you pay for up front each month, like VOXI, SMARTY, giffgaff and Lebara, can't go over.
Spend caps on contracts. iD Mobile lets you set a cap from £0 upwards, free. Sky Mobile has a spend cap on each SIM.
Adult content blocked. UK networks block 18+ sites by default.
Monthly rolling. Kids lose and break phones, and their needs change. Avoid long contracts.

Our picks

Teenagers who live on social media: VOXI includes unlimited use of the main social apps.
A first phone: giffgaff or iD Mobile. Cheap, monthly and easy to manage.
Lowest price: Lebara, Talkmobile or SMARTY, if their network has good signal where you live.

FAQ

Common questions

What age can a child have their own SIM-only plan?

Most networks need the account holder to be 18 or over, so a parent usually takes out the plan and gives the SIM to the child. Check with the network.

Are adult websites blocked on children's SIMs?

Yes. UK networks block 18+ content by default. It stays blocked unless the account holder proves they are an adult.

Can a child run up a big bill on SIM-only?

Not on plans you pay for up front each month, like VOXI, SMARTY, giffgaff and Lebara, because you can only use what you have paid for. On contract plans, set a spend cap.

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