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Free Sim cards

Cheapest for data, texts & international calls

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Updated 8 Apr 2015

Mobile networks are doling out free no-contract Sim cards: used right they can get you unlimited texts, free Skype calls, cheap calls and even 2for1 cinema tickets.

So either switch to them or pop them into any unlocked handset (see unlocking info below) for specific tasks.

Top free Sim offers

Cheapest for high users - 2,000 mins, unlimited texts & data


GiffGaff Mobile provider GiffGaff, while officially a pay-as-you-go Sim-only provider, offers top up bundles which are as good, if not better, value than some contracts. You can get 2,000 inclusive minutes and unlimited texts per month, as well as unlimited data, when you buy the £20 GiffGaff 3G goody bag.

This is a great deal for folk who use their phones a lot, but can't get or don't want to tie into a lengthy contract.

You can get a free Sim card, but you'll need to top-up by at least £10 to activate it. As it's a pre-pay deal, there is no credit check required.

You can use your existing handset but only if it's unlocked. See Mobile Unlocking.

How to get it incl £5 free credit: Order a free GiffGaff* Sim online (it should arrive within 1-3 days), then activate it and top up by at least £10 to get your free £5 credit.

Standard tariff costs (based on £ goody bag)
  • Calls. Free (up to 2,000 mins, then 10p/min)
  • Texts. Unlimited
  • Data. Unlimited
  • Other. Read the full tariff details* for more info.

Top up for triple credit - £30 for £10, incl 5,000 texts for £5


Tesco Mobile Tesco offers 5,000 texts for £5 when you opt into its text bundle, making texts just 0.1p per message. You can also add 150 minutes bundle for £5. Tesco are also offering to triple your credit. You can top up £10, £15 and £20 and Tesco will give you £30, £45 and £60.

The bundle will automatically renew every month until you stop it. If you use all 5,000 texts in one month you'll be charged the standard rate of 10p/text.

How to get it: Get your free Tesco Sim online - just fill in the form. Then add it via your online account.

Standard tariff costs
  • Calls. 25p/min
  • Texts. 5,000 free (then 10p/text)
  • Data. 10p/MB
  • Other. Read the full tariff details for more info.

Best for international calling - £15/mnth for 1.5p/min to India


O2 If you frequently call friends or family abroad, O2's free International Sim can cut costs dramatically. Get the Sim and top up £15 every month and you can call landlines and mobiles in India and China for 1.5p/min, as well as 3,000 O2 to O2 calls and texts plus 100MB of data.

There's a raft of other countries which start from 1p/min bracket for landlines, and rates to mobiles overseas are also competitive (see all international rates*).

If you tend to call the same people abroad, and you've both access to a computer, it may be more economical to use an internet phone service like Skype instead (see the VoIP guide for full info).

How to get it: First go through to the free O2 Sim* page, select the International Sim and fill in the form to apply. When the Sim arrives, top it up by £15 to get the cheap rates.

Standard tariff costs (based on International Sim, £15 top up)
  • Calls. 25p/min
  • Texts. 12p/text
  • Data.1p per 3 kilobytes capped at £1/day
  • Other. Read the full tariff details* for more info.

Is your handset unlocked?

When you buy a new phone, chances are it'll be locked to the network you bought it on, and if you try to put another network's Sim card in it simply won't function. So to take advantage of most of the offers below (ie ones that aren't from your handset's network) you'll need to unlock it.

Unlocking most modern handsets will require you to buy a code from your network, though some older handsets can still be unlocked for free. For full details on the ins and outs of unlocking, read the full Mobile Unlocking guide.

Get a bit of cashback too!

It's possible to earn cashback when signing up for a few of these Sims too. Needless to say, the amounts you'll earn are pretty small, but if you're already a member of a specialist cashback website it is an option.

For more info on how this works read the full Cashback Sites guide beforehand.

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