Hi,Here to let everyone know that this is working on the OnePlus 7T Pro
Device: OnePlus 7T Pro
Build Number: Oxygen OS 10.0.3.HD01AA
Android Version: 10
Profile Used: India VoLTE
You need to install the 2 files in the zip file i attached in my post, one of them is the upgraded OEM LogKit, you need it to be able to view the VoLTE / VoWiFi switches when going into Factory Mode by pressing *#800# . The 2nd file is the modded Engineering Mode file, you need that so you're able to go into Engineering Mode on Android 10 by pressing *#801# Because you have to enable the Full-Switch Port
If anyone needs any info just Quote my reply here or send me a private message
Could you please share how can those APK files can be installed on OnePlus 3T?
Hi,Thanks for that... Lead me to compare getprop output before and after activating "serial" and "full port switch" using *#801#
Here is the result :
Unfortunately, are not even install on Lineage PIE on OnePlus 3T. Still searching....Download the attached zip file, extract the two files inside, and send them to your phone, then install them, then simply follow the steps i mentioned and the main steps in the OP.
But i have to say, i do not know if this works on the 3T, i have only tested it on all the 7 series devices only.
I would have a question: Please confirm, are you on custom ROM and you are able to enter *#801#?
If yes, I would like to know too, please.
---------- Post added at 11:01 PM ---------- Previous post was at 10:57 PM ----------
Unfortunately, are not even install on Lineage PIE on OnePlus 3T. Still searching....
Whenever I load a profile it never shows up. I can delete profiles, change sub0,1 etc. I am connected successfully but the loaded profile never comes up. It seems to work, refreshes the list but the .mbn file I load never shows up in the list. What am I doing wrong?
Hello, I'm trying to download the files for the procedure from the original post but the links are dead..
Same here, if anyone had a mirror I'd be grateful
[Old How-To, if the current one doesn't work for you, try this way]
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
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 "Software Download" in your QPST start menu folder, best to do by right click & "run as administrator"
Go to: MCFG_PDC (to the right), 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
Go again to MCFG_PDC, select your device, scroll down to Telefonica_UK_Commercial, right click and SetSelectedConfig for both Sub0 and Sub1
Click on Telefonica_UK_Commercial again, then to the right on Activate and on Start --> you will not see a confirmation screen, so don't be surprised
I received an error but it still worked.
Yes, select UK 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
Can anyone please provide a usable source? These sources are no longer working: and redirecting to homepage