cellphone
Ibrahim asked:

I recently bought cell 903t Vodafone Japan. I know I can use T-Mobile in the conditions with this phone. I used someone else 's SIM card and inserted it into the phone and got message saying that this SIM card can not be used. What do step should be revenue at this point to convince this phone to work? I should just take t-mobile and they do enter one of their SIM cards, etc.?