I am pretty sure that some of you guys heard that At&t is getting rid of it's 3G network and moving on to VoLTE. BUT I am very annoyed because it's looks like At&t is going back to it's old practices. Sigh. Only whitelisted devices can work with their VoLTE. Even your phone have the proper LTE bands, if it isnt on the whitelist, it will not work. ""ANNOYED""