I have done exactly that, and the mms worked for awhile and no longer works. I wonder if changing the plan will work. Basically I can put the sim in a blackberry and get them to turn it on with a different plan
Are you sure they check the imei's? if so, that may be tough. But I can see a lawsuit over it. AT&T claims it is a multi use plan, and jailbreaking the iphone and using Swirly is not illegal... so, if i pay for a plan and cant use it, then that is breach of contract......