Qualcomm promised that MSM8998 (Snapdragon 835) will get Dual VoLTE via OTA updates provided by OEM Manufacturers.

But Xiaomi (one partner of Qualcomm) 's engineers said that Qualcomm refused to provide the update due to the release of SDM845.And the hardware itself FULLY supports Dual VoLTE of course.

Qualcomm has cheated customers who bought phones with 835 SoC.

So we now ask Qualcomm for Dual VoLTE that we deserve.