Originally Posted by gigamchz
The thing I'd like to keep is WiFi calling as my office is a dead zone. Is the WiFi calling part of the radio? Is it hard ware specific? Just wanting some light shed on this issue. Thanks.
You can't use WiFi calling with an AT&T or any other SIM. WiFi calling (a necessity for me here in this valley with horrid coverage, but right over the in L.A. signal is fantastic)) is a proprietary, locked and restricted feature exclusive to (some) T-Mo branded devices with T-Mo kernels and T-Mo SIMS. There is no way around this.
In fact, I just read that TMOUS WiFi calling will finally be included in iOS 8
for T-Mo branded iPhones. My wife and her iPhone 5 has to stand in the front yard in order to take calls without dropping. I just laugh, but she has to have her iPhone.