Just went through the process, figured this may help some of you. 1) Activate iPhone on the line it was ordered on via iTunes (lets say phone number ends in 1234). Do not allow it to sync anything from your iTunes (music, apps, contacts, calendars...etc..) 2) Once activated, long into MyVerizon for phone 1234, re-activate it (under "activate a device) using the old MEID number that the 1234 phone was on before the iPhone. Dial *228, and the old phone is now back to being 1234 line. 3) CALL VERIZON and have them add the iPhone MEID number on the phone number you want the iPhone on (lets say 6789). The rep will ask you to dial *228 to activate iPhone and will quickly realize *228 DOES NOT WORK on iPhones. Say that is all I needed, and hang up on them (you have to call verizon, logging into My Verizon like you did for the 1234 phone will not allow you to add the MEID number for the iPhone, it will give you an error). 4) With your iPhone disconnected from iTunes, go to Settings-->General--->Reset---> Erase All content and Settings. Your phone will take a few minutes and reset itself Once done, it will prompt you to connect to iTunes 5) Connect to iTunes to activate your phone just like you did with the 1234 number but now it will activate on the 6789 number. Hope this helps and Verizon tech support was completely useless to me and I figured this out while I was on hold with them.