A Tesco Mobile SIM with £10 top-up loaded on to start you off. Once you've used this up you can triple your credit with £10 and £20 top-ups.

For example, if you top-up £10 we'll give you another £20 free credit, giving you £30 to spend on calls and texts to any UK mobile or landline, at any time. A £15 top-up will get you an extra £30 free credit and a £20 top-up an extra £40 free credit.

If you choose to top-up £10 we'll double it - giving you £20 credit. It really is as good as it sounds. Your free credit is given once each month, takes 48 hours to activate and is valid for the whole month.

We also give you half price calls and texts to your five favourite numbers, so calls to these numbers are 10p per minute instead of 20p and texts are 5p a text instead of 10p.

Tesco Mobile Pay as you go terms & conditions apply.

Call 282 before first top-up to register for free credit and 5 favourite numbers.

Free credit given once a month, takes 48 hours to activate and is valid for 1 month.

Flat rate, 5 favourite numbers and free credit is for calls/texts to UK mobiles, 01, 02 and 03 numbers only.

Max call costs: 08 - 20ppm/070 personal numbers - 50ppm.

Existing customers must change tariff. There may be a charge for unlocking other network phones.

Full terms/price visit www.tescomobile.com.