Is S-OFF needed to switch carriers ?
I have a T-Mobile HTC One M8 which is bootloader unlocked and rooted with custom recovery. I also have a custom ROM (Viper One) in there. However I couldn't achieve S-OFF (tough luck!
). So my questions is, can I use the phone with other GSM carriers ? I want to start using AT&T service with this phone. Is it possible to use it without S-OFFing ?