i have a Sony Erricson w810i registered on t-mobile but i want to change it to o2 but i don't know how can someone give me the special code or something please
well basically your gonna have to unlock your phone. there is no code to make your phone work with other sims. you should go to any mobile phone shop they should unlock your phone very cheaply about 5 pounds. thats the only way to make your 02 sim work
unless you wanna do it over the internet which is much more difficult. so yh 5 pounds it cheap
You can change your carrier by unlocking your mobile so that you will be able to use your O2 SIM in your sony ericsson without any restriction..there are many ways to unlock your mobile..the safe and best way is by unlock codes..try theunlockarena to get unlock code for your mobile and get it unlocked safely without taking it to any shops for unlocking..once you get unlock code you yourself can unlock your mobile..