i'm trying to unlock my sidekick 3 with an at&t sim card and it's not working. i watch videos on youtube on how to unlock it and when they go onto the menu to unlock the sim card it always says "unlock sim" at the top but mine doesn't say that. why ? how do i unlock it ? and do i have to be using a tmobile simcard to do this instead ?
also, when i go to sim settings it doesn't say to change my pin.