How do i use my iPhone 6 with local sim for international travel. When I place local sim, I get a message invalid sim and that I need to unlock the phone. I talked to verizon customer service and they state all iPhone 6 phones are unlocked and that they can not unlock anymore, when I talk to apple customer service they state that my phone is locked to verizon and they can not unlock it. how do i get to use my iPhone 6 for foreign travel