“Will this unlocked vesrion work both at verizon (with full 4G LTE capacity) and any GSM network in Europe? Hello, I have a number of questions. I want to buy this phone at best buy, but would like to confirm a couple of things first. 1. this model is the one that has cuad core? 2. this model will work at full capacity (4G LTE etc) both with verizone and regular GSM when I take it to Russia (GSM)? 3. Does it have full warranty? Thank you!”