Originally Posted by
bakron1 As far as I know, Sprint is a CDMA network and even if you pay the device off, it won’t work on a GSM network like T Mobile or AT&T. Unless something has changed?
I believe you are thinking backwards. Prior to the XS (with the exception of the 6, I believe it was, but may have been the 6s) the CDMA versions of the iPhone would work on all carriers -- they had radios for both CDMA and GSM. However, the GSM versions of the phones (AT&T and T-Mobile) did not have the CDMA radios, so would not work on Sprint or Verizon. And, with Verizon over the last year or two, you've still been able to use Verizon with the GSM phones -- the phone worked LTE only, as Verizon is preparing to move to LTE only (shutting down the CDMA portion of the network).