Ok, here is the situation. I had an iphone 6 on Verizon which I had replaced by Apple under AppleCare++. After receiving the phone from Apple, I inserted my Verizon SIM into it to make sure it would work and that it was activated and then pulled the SIM card out as I planned on selling on Ebay since I recently got the iPhone 6++. The buyer on eBay is now telling me he is getting invalid SIM when he tries to use an international SIM Card. It was my impression that Verizon iPhone 6's are all factory unlocked now and Apple will send replacement phones under the same condition that the original iPhone was. Does anyone know why my buyer is having trouble using an International SIM card and how can he get it unlocked?