may i know this model support for digi 4g plus n volte?

I have digi infinite 150 n pospaid 78v. i just tried the speedtest, digi had do some bandwidth limit on infinite 150 plan. i use speedtest on both, i got 10.84Mbps for infinite 150 while 39.95Mbps for postpaid 78v. i lazy to upload the pic, but it is true to happened on my area.

i m using huawei mate 8 dual sim. only switch the 4g to either one sim and do speedtest. i do inside my room, in the same place put on table to avoid movement.