Alright let me get straight to the point I have a supposedly unlocked slvr l7 phone. When I first got it I put in my mothers nextel sim card and it worked. Later then I started using t-mobile prepaid cards. The point is that I later stop using them because I want to join my mothers nextel plan. But when I again tried her sim card on my phone it doesnt work no more. It just says for emergency only. I dont know what the problem is now. Maybe it got branded by the t-mobile sim card or something. Would really appreciate any type of help.