HTC Desire 820, 4.5G desteği sağlamaktadır.
TD-SCDMA 1900 / 2000 - Asia
4G bantlarıLTE band 3(1800), 7(2600), 8(900), 20(800) - Europe
LTE band 1(2100), 3(1800), 7(2600), 8(900) - EMEA
LTE band 1(2100), 3(1800), 7(2600), 8(900), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Asia...