How the hell do I enter this unlock code into the phone ? its been so long since I have done this . I already tried a foreign sim in the phone but no luck , I even changed the settings to GSM when I had the att&t sim in it . I'm wasnt getting any pop ups about it being the wrong sim , or asking me to enter an unlock code. I even tried searching for gsm networks with the att&t sim in , but it wasnt seeing any. Do I need to deactivate service in order to get the pop up for entering the unlock code ?