I really want the t-mobile sidekick 3. Mostly because its amazing and I want to show off :) but in my area I can’t get any national carriers, i.e. AT&T, sprint, t-mobile. So I’m stuck with a local carrier that uses SIM cards. I found a sidekick on the Internet that is “unlocked”. I was wondering if I would be able to put my SIM card into the sidekick and it will work. Or will it go mad and not let me?