I want to get the iphone 6 next friday but having trouble on understanding if it is going to work with my carrier, thing is i have not gotten a straight answer from the sales person that got me Nextel Mexico on whether the carrier is GSM or CDMA so i have been trying to put the dots together but i'm still very confused on this subject. They gave me a Moto X which i was planning to use meanwhile the iphone 6 was available. The Moto X has a sim card in it. But when i put that sim card on an Verizon Lumia ICON i dont even get service bars... i also tried it on a iphone 5 ATT unlocked and a HTC M8 on tmobile unlocked with the same ''no service'' result... 1. Does the fact that i have a sim card mean its GSM? 2. My Moto X is model xt1053, T-Mobile uses one like that, does that mean that since tmobile is gsm Nextel mexico is also? 3. I was able to look at a sticker placed in a box with an Nextel Iphone 5s in it. It said it was model A1533 and something about M3298E/A... it also has a section with a IMEI/MEID with a 15 digits after that. Does that give any clue as to identify if the phone uses GSM or am i simply out of luck?