A:AnswerHD calling yes. WiFi calling no. It’s not allowed by Sony on this device. Not even an option. Don’t waste your money. I bought it and returned next day due to all the features it’s lacking for 700 dollars.
A:AnswerApparently not. I bought this phone being told that it would by AT&T. I switched from Verizon (had the Z3v). I then found out the hard way that AT&T will not support LTE 4G services on unlocked unbranded phones. The customer service was just horrendous and misleading.