I am currently a AT&T/Cingular customer with a 3G sim card. I read somewhere I just have to activate the iphone and then I can use my AT&T sim card without unlocking the phone... Is this true?
Can I use iBricker or any jailbreak program to do this?
Will I be able to apply the new apple update if the phone is jailbroke and not unlocked?
Will I be able to use my current data plan?
I don't want a new contract and I like my existing plan.