CONVERT LTE TO VOLTE

https://techyuga.com/convert-lte-to-volte-in-kolkata/

How To Enable VoLTE Support in Any Mobile ?

As mentioned earlier once you checked VoLTE support in your mobile, you need to confirm that it is enabled or not. If you can use unlimited HD voice calls over LTE that means it is working fine. But if you unable to use unlimited HD voice calls then you need to enable VoLTE support in that device. This process can be done in two ways,

STEP ONE:

Open dial and Type *#*#4636#*#*

Choose Phone information option from test Screen.

Now you can Enable VoLTE Support Provisioned Flag.

Restart your device.

Now you can see 4G LTE option under Network Bar

This will activated unlimited HD Voice Calls

This is the basic process, it won’t harm your device this will simple make one change in your network settings. You can restore those settings at any time.

STEP TWO:

First you need to Install SQLite App & launch this app.

Then visit file Manager app.

Tap on data > data > com.android providers.settings > databases.

Open Settings.db , Global , search for Volte_feature_disabled

Change the value from 1 to 0

Restart your device, this is how you can enable VoLTE.