so i have at&t but i use a sidekick, i found a way to hack it. anyways, i want a ringtone. and i can't get one from the at&t site, because they want the phone model. as well as t-mobile. so if i put my sim card into an old phone, get a ringtone, save it to my sim card, and then put it back in the sidekick? will the ringtone be there, on the sidekick? will it work?
