Hope somebody can help me out. Just bought a sealed iPhone 6 Plus from highly-rated seller on Swappa. Model was listed as A1524 - Sprint unlocked. I confirmed that the unlocked Sprint model would work with Cricket and also liked that it included Sprint compatibility and at least some Verizon compatibility if I ever needed it. When I received it, checked everything over and all seems fine. No issues with device. My question is about the different model numbering and what appears to be a discrepancy. First let me point out up-front that the device serial and IMEI both match between the About screen and the box. Having said that, though, the phone shows A1524 on the back like it should. The box, though, shows A1522 and MGAX2LL/A - both of which I thought were the unlocked GSM model. The About screen shows NGA82LL/A as the model, but I can't find anything about that. Am I missing something here? How can the serial and IMEI match but the box and phone seem to be for different models. Anybody shed some light? Thanks!