I’m considering purchasing the Motorola Moto G global GSM unlocked 8 GB from Amazon. I’m interested in the phone for the sole purpose of being able to take it to Germany so that I could put a global Sim card in it. If I really like the phone, would I be able to bring it back to the states and have my current Verizon service transferred to the phone, or would there be some sort of incompatibility issue? Thanks for your help in advance.