If you're answering this thread, you should have 1) The Sony Xperia XZ1 (please mention also if it's the int'l model or U.S. one) 2) T-Mobile as your network carrier.
Some online publications state the XZ1 will be VoLTE-certified with T-Mobile, while others don't. T-Mobile REQUIRES VoLTE-certification in order utilize the newer Band 12 on their network, so this is pretty important as this band is becoming more and more prominent. It has a much farther range than their other bands (2 & 4), and also is 4 times better at penetrating buildings.
Thanks!
Some online publications state the XZ1 will be VoLTE-certified with T-Mobile, while others don't. T-Mobile REQUIRES VoLTE-certification in order utilize the newer Band 12 on their network, so this is pretty important as this band is becoming more and more prominent. It has a much farther range than their other bands (2 & 4), and also is 4 times better at penetrating buildings.
Thanks!