Chosen Solution
How compatible are the different types of iPhone SE with each other? Can I use a logic board from, for example, a T-Mobile one(because I see a good one on Craigslist right now) with my a1662 Verizon one? It’s my understanding that T-Mobile and Verizon use different antenna bands, would that cause any problems? Thanks.
Verizon probably won’t accept phones sold as GSM even if it supports CDMA in theory. US CDMA phones work differently from Asian ones. I don’t have the exact implementation details but it seems to involve writing MEID/ESN or security keys directly into the phone and register then with Verizon network at factory, due to technical or policy reasons they probably won’t do that for phones already sold. Although most networks have already moved to LTE, which uses SIM card, not data written into the phone for authentication and are planning to decommission CDMA altogether, I’m not sure whether this factory pairing data is still required. Sprint might be worse, check with your carrier’s support regarding details.
All Carriers in the US use A1662. LTE (Bands 1, 2, 3, 4, 5, 8, 12, 13, 17, 18, 19, 20, 25, 26, 29) CDMA EV‑DO Rev. A (800, 1700/2100, 1900, 2100 MHz) UMTS/HSPA+/DC‑HSDPA (850, 900, 1700/2100, 1900, 2100 MHz) GSM/EDGE (850, 900, 1800, 1900 MHz) The problem isn’t that. If its locked to T-Mobile, you are going to have to unlock it first. Unlocking it requires paying someone online via web or Ebay. It may not be unlockable if the original phone is reported stolen, is still not fully paid for, or blacklisted. If the phone works after swapping the board, you’re going to have to go to Verizon and register the IMEI/ESN after unlocking the phone.
