I have read on more than a few sites that wi-fi calling is not possible on a unlocked Huawei Mate 9 even with the T-mobile sim card. Does anyone know if this is true or is the Mate 9 not supported? From what I have read, the phones were purchased from Amazon and/or Best Buy. Does this make a difference? Appears to be a nice phone but I do need wi-fi calling because the office building I work in.
Hey there! So to answer your question, T-Mobile Wi-Fi calling is only going to be available on devices sold by T-Mobile. Some devices may claim that they have T-Mobile Wi-Fi calling but since they were not sold by us, we have not tested them for compatibility so we are unable to verify or guarantee that it will work.