TL;DR - Don't do it. If you still want the reasons why, here they are. The IMEI does not match a list that Apple sent Verizon of valid iPhone 6, and therefore, will always read as "Non-VZW Device" on the website and in their system. I had a service support ticket in that was escalated as far as it can go. The reply was "You need a new phone". So I contacted Apple and they were more than helpful. The tech I spoke to put his supervisor on the phone, and she agreed that it was pretty lame, and offered to replace my phone with a VZW device. Basically, I had to order the phone from Verizon, and mail my phone back to Apple for a full refund. Given the Edge program Verizon offers, I can simply pay off the phone immediately, and not spend a dime. The phone works perfectly on the Verizon network if you can get a SIM activated. The only catch with the T-Mobile phone is that you cannot receive any promotions. Currently they offer $25 off your smartphone line fee, which you cannot get unless the system sees your phone as a VZW device.