Is your mobile locked to network and do you want to replace the SIM with other provider's SIM in your locked mobile?? if so you can try unlocking your mobile by unlock codes and there are many ways of unlocking like hardware/software unlocking,cable unlocking,remote unlocking and unlocking via codes..the best and safe way of unlocking is by unlock codes..you can try http://www.unlock-free.com/Unlock-Free to get unlock code for your mobile and get it unlocked instantly..and you can call your provider to know whether there is any thing like vodafone offer..