Hi guys need your help. I recently got an at&t iPhone 6 plus as a gift. The iPhone was purchased full price from apple store. Does anyone know if I can use a Verizon sim card on this device? Thanks! Here are some updates. I was been pretty busy, so just went to Verizon yesterday, and the guy told me there are two options in my case 1) since it was purchased in apple store, I can go back and ask them to swap it to Verizon version 2) I can trade in my AT&T one at any VZW location for an unlocked Verizon iphone 6 without losing any value, but you will have to sign a 2-year contact (just for the service, the phone is absolutely unlocked) I don't want to sign the contract, so I am gonna check with apple store tomorrow.