First of all WiFi calling is still a specialty thing requiring custom firmware (see: you cannot BYOD on Republic Wireless) Second of all the N6 is one of the f

First of all WiFi calling is still a specialty thing requiring custom firmware (see: you cannot BYOD on Republic Wireless) Second of all the N6 is one of the few phones with dual GSM and CDMA radios, and T-Mobile/Sprint are GSM/CDMA, respectively.