My company is making us go to Blackberry and will be sending me an AT&T Blackberry. I currently have an AT&T iPhone 4 jailbroken and unlocked. Aside from the mini/micro SIM aspect of it, can I get my iPhone to work on a BB plan? I have a SIM cutter ordered and in the mail. Will I be able to just pop the BB sim into my i4 and use it? I DO NOT want to have to get rid of my i4 and go back to a BB and don't want to have to pay for and carry another phone. There's gotta be a way to make it work. Right?