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Enable VoLTE and Wi-Fi Calling Android 11 on OnePlus 8 series and OnePlus 7 5G Dec 15, 2020

jhoon_09 , Dec 15, 2020 :

1- Install Logkit applications on our phone. (do not install engineer mod)
https://www.mediafire.com/file/z5wum4grlgoke3x/logkit.apk/file

2- USB Debugging must be enabled.

3- Install QPST with Qualcomm USB Drivers and OnePlus Drivers on your computer as an administrator. Right click run as administrator.

QPST:
https://www.mediafire.com/file/8kkchoh7vhh3nqs/QPST_2.7.460.rar/file

Qualcomm USB Drivers:
https://www.mediafire.com/file/jiub6b3vl8zjdwd/Qualcomm_Driver.rar/file
Note: Chose (WWAN-DHCP is not used to get IPAddress )

OnePlus Drivers:
https://www.mediafire.com/file/4ujy26bknstduff/OnePlus-USB-Drivers.zip/file


After installing all that i would recommend to Reboot your Laptop or PC.


Steps to be made on your phone:

1- Dial * # 800 #

2- Select Engineer Mode. Press ENTER.

3- From the screen that appears. Go to the Oneplus Logkit section. Scroll down a little bit and enter the Function Switch section.

Switch ON volte (cancel the restart) , Switch ON VoWiFi as well .

4- Go to Settings – SIM & Network – SIM 1

Switch ON VoLTE and WIfI calling and do the same for SIM2.

Then Restart your phone.

-------------------------

Actions to do:

1- Connect to the computer via USB, do not select anything (File transfer etc.).

2- Go to C drive on your computer then open the Android file .. in the top address bar type CMD then enter. (just CMD no other words or address should be there).

3- Enter these commands on the CMD screen.

4- Type Code: adb reboot ftm
Enter.

6- Chinese texts will appear on the device, after a while the device will turn on, but there will be no screen.

7- Type Code: adb shell
Enter.

8- Type Code:
setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb
Enter.

9- Go or Search the application named (PDC )from the start menu of your computer , find it, right click and run it as administrator.

10- Select the device from the PDC Program, Device section. And wait until you see list.

Find:

Commercial-DT-VOLTE Or Germany Volte

11- Once you find it, Right Click on it.

13- Set Selected Config Option and select the icon you want to activate.

[sub0 = Sim 1 & sub1 = Sim 2] For dual line, you can choose both one by one.

14- After done, Pending text will appear. Then press the text Activate .

15- Finally : on the CMD screen type: adb reboot
Enter.

Your phone will restart with VoLTE and VoWIFI should be showing.



On my OnePlus 8T I lost the 5G , I did the Full steps to Enable 5G for Android 11 on OnePlus 8 series and OnePlus 7 5G:
https://forums.oneplus.com/threads/...on-oneplus-8-series-and-oneplus-7-5g.1345340/

All working very well. the 5G and VoLTE plus VoWiFi.

Best Wishes