In the past couple of days I saw two threads with completely different explanations how this is supposed to work each claiming they were right. Which is it? When buying a Verizon phone from the Online Apple Store with a Verizon users credentials, but intending to use it with a T-Mobile sim, 1. Will you first have to verify the Verizon sim they sent you by inputting the same credentials, then power down the phone and switch it out with your T-Mobile Sim and be good to go? Does this disable the other phone line's sim you used during the credential process and do you have to provide them the sim that was in the iPhone originally? Do they also incur the $30 activation fee on their bill? or 2. Remove the Verizon sim before powering on and put in your T-Mobile sim and be good to go? Please let me know which you did today with the new phones as this is still not so clear to me what the exact procedure is.