Why can’t I activate 3G network mode on my HTC Desire 820Q? .It’s just highlighted to 2G mode only.
The 3G mode is first enabled from the service provider side for many companies in India. You can call you customer care for the activation and they will get to you with some steps for its activation by simply knowing your phone’s model. After that you can restart your phone and 3G would be enabled on your device.