Not sure if it will hold up, but it worked for activating. I took her sim out of her old, non-data, phone and placed it my old iPhone 2G and activated it through iTunes. It allows you to select the old $20 unlimited data with 200 texts plan. Everything went fine. Now when she activates her iPhone 4 the unlimited data should already be on the account. Does anyone think they will change it to the new capped plan once she gets the new phone?