How to enable VoWiFi on OnePlus smartphones!

@Ameen I have op7 on android 10 and i don't have the option. So i guess it is not necessary

It has been disabled by default by OnePlus. You can enable the option using the below given steps:
1. Dial *#800#
2. Go to Oneplus logkit
3. Go to function switch
4. Check on Vowifi switch
5. Reboot your phone
6. go to settings -- wifi & internet -- sim & network
7. Turn on WIFI Calling
8. Reboot your phone

Wait few minutes you will see volte will be replaced by vo-wifi .

 

[thadougamer]

To make VoWiFi work in flight mode, one needs to enable the VoWiFi profile stored in the EFS Partition using the Qualcomm QPST Tool. I cannot try it right now as my laptop is broken. But many OnePlus users have reported that VoWiFi works in Airplane mode after enabling the VoWiFi profile stored in the EFS Partition.

@sanke3 Told you

 

[thadougamer]

Worked on OP6 !!!, Thanks @sanke3

I used Telefonica_UK_Commercia and had to disable commercial_reliance

Not working for me bro. I disabled Commercial_Reliance and activate Telefonica_UK_Commercial but after reboot it reverts back to Commercial_Reliance and automatically disables Telefonica_UK_Commercial.

 

[Notorious]

@thadougamer don’t reboot.

it works for me w/o reboot.

hack doesn’t survive restart.

 

[thadougamer]

@Notorious Why did you write reboot in the tutorial?

 

[thadougamer]

The only way to survive a reboot is to remove Commercial_Reliance from the list

 

[thadougamer]

And activate Airtel_VOLTE_Vodafone or Telefonica_UK_Commercial in it's place.

 

[Notorious]

@thadougamer did you remove commercial reliance?

I didn't want to take risk

 

[thadougamer]

Nope. Was little bit afraid to remove it. But someone on XDA confirmed that it survived reboot after that.

 

[sanke3]

Not working for me bro. I disabled Commercial_Reliance and activate Telefonica_UK_Commercial but after reboot it reverts back to Commercial_Reliance and automatically disables Telefonica_UK_Commercial.

You didn’t click on activate button in the end?

 

[thadougamer]

@sanke3 Clicked 100%