Am I out of luck here? I purchased an unlocked iPhone in Asia a couple weeks ago. Tried upgrading my plan from AT&T's unlimited 3G to AT&T's unlimited LTE and the representative says it can't be done. ---------- Ok, so after some digging I found out that indeed the A1429 i5 that I have won't work on AT&T's LTE network. However, will the A1429 GSM version work on Verizon's LTE network? Is there an actual difference between the A1429 GSM and CDMA version? How do I tell if my 1429 is GSM or CDMA?