[OnePlus 5T  Guides, News, & Discussion] dagoban:
[UPDATE]

Updated QPST version + new how to

Exciting news, [MENTION=3068641]jamal2367[/MENTION] from https://jamal2367.com has developed a way to get VoLTE + VoWifi working for many countries + carriers.

If you are on Vodafone and you are having problems with Telefonica_UK_Commercial, try India-VoLTE-Vodafone instead.

The name of the country doesn't matter, its all about the actual configuration settings stored in the profile.

So far tested and working

Telefonica_UK_Commercial settings

Germany: T-Mobile, O2, Vodafone, former E-Plus, 3rd parties like Alditalk,...

Portugal Vodafone

Czech Republic Vodafone

Greece Cosmote

Romania Orange --> if not working, use Telia Finland settings instead of Telefonica UK

Netherlands Vodafone

Switzerland Swisscom

Belgium Orange

Malaysia telco Digi

TurkeyTürk Telekom

Austria Drei

Greece Cosmote

Hungary Telekom

This is NOT just enabling the settings in the menu but really enabling the full features!

The German carriers have enabled VoLTE for quite some time already and OnePlus has officially enabled the feature, but we were still not able to actually use it, only to show it in the settings because the carriers have not distributed OnePlus with the appropiate settings for VoLTE + VoWiFi.

Original credits go to jamal2367 from https://android-hubo.de/thread/8203...t-dual-volte-vowifi-freischalten-de-ohne-root

It works for OnePlus

3/3T

5/5T: Link to 5: https://xdaforums.com/oneplus-5/how-to/volte-vowifi-german-user-t3816516

6 Link to 6 https://xdaforums.com/oneplus-6/how-to/volte-vowifi-german-user-t3817412

Since I own a 5T this is a how to for the 5T, see the original threat for the other how to's

Requirements:

OxygenOS

With root-->magisk--> Module VoEnabler 1.2 by Toucan-->enable it

w/o root--> open the dialer: *#800# --> oneplus Logkit --> Function Switch --> enable VoLTE + VoWifi switch

Disclaimer

You can break your phone, so know what you do

Steps

1)To be safe, make a backup via TRWP of your EFS partition BEFORE you flash anything! If you're not rooted, do a nandroid backup via fastboot

2) Download and install:

https://jamal2367.com/VoLTE-VoWiFi/QUD.WIN.1.1 Installer-10037.3 Setup.zip

https://jamal2367.com/VoLTE-VoWiFi/QPST_2.7.460.zip

Just use the standard settings and click on OK, next, ...

3) Connect your phone to your laptop via USB

4) open dialer app and enter *#801#

Set Serial and Full-port switch to ON

5) Open "PDC" in your QPST start menu folder, best to do by right click & "run as administrator"

Select your device, right click on "Oversea-Commercial_DS" and deactivate Sub0 and Sub1

Click on Oversea-Commercial_DS again and click on remove

6) Close the app and reopen it

7)

Select India-VoLTE-Vodafone or Telefonica_UK_Commercial, right click and SetSelectedConfig for both Sub0 and Sub1

8)

Click on the profile from step 7 again and click on Activate

Yes, select UK/India even if you are located in another region (see above for comfirmed locations + carriers)

9) Restart your phone

10) Voila, you now have working VoLTE + VoWiFi

[IMG="VoWiFi"]https://i.imgur.com/jrCDFw8.png[/IMG]

[IMG="VoLTE"]https://i.imgur.com/W2gBkvy.png[/IMG]