What are the steps in unlocking a G3 cellphone from Japan to use in the USA?
I recently bought a 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 a message saying that this SIM card can not be used. What do a step should be revenue at this point to convince this phone to work? I should just take a t-mobile and they do enter one of their SIM cards, etc.?