easymobile have a SIM for just £3 which somes with £30 free airtime!! That's like having £27 in free airtime. Also, if you wish, you can purchase via QuidCo.com who'll give you an extra £8 in cashback for buying the SIM. So you'll be making a profit of £5 on the deal and getting £30 free airtime to use up!! What are you waiting for??