The network standards supported by HTC Desire 820(D820t) mobile terminal are as follows:
As can be seen from the parameters in the figure, the mobile phone terminal supports Unicom's 2G network and mobile 4G, 3G and 2G networks.
Therefore, the mobile phone terminal does not support Unicom's 4G network, but it can use the traffic in Unicom's 4G mobile phone package under the Unicom's 2G network environment.
Unicom's 4G card can be used on ordinary 2G (specifically GSM) or 3G (specifically WCDMA) mobile phones. The speed of 4G mobile phones is better than 3G (including HSPA and HSPA+), and 3G is better than 2G.
Unicom's 4G package is used in ordinary 2G/3G mobile phones or under the conditions of 2G and 3G networks. The voice and data service charges and other service charges have nothing to do with the network used, and are charged according to the selected 4G package tariff standard and charging principle.