VoLTE

How to activate the VoLTE function of the handset
 
iPhone (iOS 13):
(1) How to Turn ON VoLTE in iPhone 7

Via handset Setting, select “Mobile Data Options”

Select “Mobile Data”

Select “Voice & Data”

Turn on “4G, VoLTE On”
 
Samsung (Android 10):
Method : Via handset Setting

Via handset Setting, select “Mobile Data Options”

Select “Mobile Data”

Select “Voice & Data”
 
LG (Android 9):
Method : Via handset Setting

Via handset Setting, Select “Mobile networks”

Turn on “VoLTE”
 
Sony (Android 9):
Method : Via handset Setting

Via handset Setting, select “Networks & Internet”

Select “Mobile network”

Select “Advanced”

Turn on “Enable VoLTE”
 
Huawei (Android 9):
Method : Via handset Setting

Via handset Setting, select “Wireless & networks”

Select “Mobile network”

Turn On “VoLTE calls”
 
Xiaomi (Android 10):
Method : Via handset Setting

Via handset Setting, select “SIM cards & mobile networks”

Select “SIM card settings”

Turn On “Use VoLTE”