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

  1. luckierleaves
    Cupcake Mar 8, 2021

    luckierleaves , Mar 8, 2021 :
    It is such a lovely tutorial. I have finally enabled VoLTE in my oneplus 8 pro. Thank you peep for the effort.

  2. MoeAbsah
    Cupcake Apr 18, 2021

    MoeAbsah , via OnePlus 8 Pro , Apr 18, 2021 :
    Thank you, this is very helpful.
    now i got VoLTE and VoWiFi working but still no 5G
    however from the PCD program i activated the Kuwait Zain since i live in Saudi Arabia and i am using Zain Carrier and it it works.

  3. Aautomatyk
    Cupcake Apr 21, 2021

  4. zxyzx
    Cupcake Apr 22, 2021

    zxyzx , Apr 22, 2021 :
    oh yes confirmed working on OP 7T PRO on Android 11 :)

  5. O1574383214767
    Cupcake Apr 26, 2021

    O1574383214767 , Apr 26, 2021 :
    I never got the Chinese letters on my 7T just he oneplus logo, I still got in to the device with the adb shell command, but after typing the last command, the modem is still not showing on PDC.

  6. rotem_si
    Cupcake May 4, 2021

  7. oppo001
    Donut May 7, 2021

    oppo001 , May 7, 2021 :
    Hi, the following instruction is working like a charm.

    Thanks a lot.

    Swisscom (switzerland)
    Oneplus 7t Pro

    happiboi said:
    Here is some screenshots of 5G reception, VoLTE icon, VoWiFi icon & VoWiFi Calling while in aeroplane mode to confirm all these things are working!

    So what did I do? All credits go to this guy on XDA to get VoLTE & VoWiFi working

    For the TL;DR version, I did what I mentioned previously to get 5G going here: https://forums.oneplus.com/threads/...pro-in-australia.1225092/page-2#post-21673760

    Then to get VoLTE & VoWiFi working download these files:
    EFS zip - https://drive.google.com/open?id=1PiVhB35MPx19sxqxQ4svgOvPXL1dxobt
    MBNs zip - https://drive.google.com/open?id=1v8V281EkYGI_C1KeMqVni8L2qjQLdx5P
    EfsTools 0.10 modded 1.2 - https://github.com/HomerSp/EfsTools...modded-1.2/EfsTools-0.10-modded-1.2-win32.zip
    EfsTools 0.10 modded 1.1 - https://github.com/HomerSp/EfsTools...modded-1.1/EfsTools-0.10-modded-1.1-win32.zip

    The reason I've linked both modded 1.1 & 1.2 is because 1.2 is the latest version and supports activation of 2nd SIM slot (but it errors for me so I used the modded 1.1 version but that only does SIM slot 1).

    So steps:
    - Enable the VoLTE/VoWiFi toggles first:
    - Download the OnePlus Log Kit app’s APK from > https://downloadmirror.co/1MW9/com.oem.oemlogkit_1.0-1.apk
    -Install the OnePlus Log Kit APK
    - Open dialer, type in *#800# (If this doesn't do anything, just google search "Oneplus engineer mode apk", download and install it. Then retry)
    - Click 'Enter' on the warning
    - Select 'oneplus Logkit'
    - Scroll down & select 'Function Switch'
    - tick the VoLTE & VoWiFi switch options
    - Then reboot.
    - when your phone comes back after restart, in Settings > Wifi & network > SIM & network > SIM1 (and SIM2) > you should now see the 'Enhanced communications' area have the option to toggle on VoLTE/VoWiFi

    Onto the actual making VoLTE/VoWiFi work:
    - Unzip EfsTools into a directory
    - Open command window on PC & navigate to the directory created in above step
    - On your phone, go to dialer, type in *#801# - enter into it via 'engineer mode'
    - Select "Rndis, diag switch" - ON (last time we selected "full port switch on")
    - Then in the command window, you should be able to test connection to EFStools by typing "EfsTools.exe efsInfo"
    - This should give some info & not any errors (mine was like 2 lines of information)
    - Then the real fun begins.
    - Extract the efs.zip from above download into the same directory as the EFStools (make sure the mcfg_autoselect_by_uim file is there - yes it's 0 bytes) and then run 2 commands:
    - EfsTools.exe writeFile -i mcfg_autoselect_by_uim -o /nv/item_files/mcfg/mcfg_autoselect_by_uim
    - EfsTools.exe writeFile -i mcfg_autoselect_by_uim -o /nv/item_files/mcfg/mcfg_autoselect_by_uim -s 1 (this one I couldn't get working - it's for SIM slot 2 & only works if usinf modded 1.2 version)
    - should see 0 errors
    - then open the MBNs zip & look for your carrier file. Ours are \aunz\<your carrier - e.g. mine is Telstra>\commerci\mcfg_sw.mbn
    - copy this mbn file to the same dir as the EFStools, then run 2 commands:
    - EfsTools.exe uploadDirectory -i mcfg_sw.mbn -o / -v
    - EfsTools.exe uploadDirectory -i mcfg_sw.mbn -o / -s 1 (again this one I couldn't get working - it's for SIM slot 2 & only works if usinf modded 1.2 version)
    - If it worked your screen should spew out a load of output but no errors.
    - Reboot your phone & if you already enabled the switches from my above mentioned post, you should see the VoLTE/VoWiFi icons like in the screenshots linked above.

    Seems like a lot but that's literally step by step explanation & takes roughly 5-10 mins to do slowly.

    Happy days - 5G, VoLTE & VoWiFi all working on our OnePlus 8 Pro =)

  8. rotem_si
    Cupcake May 7, 2021

    rotem_si , May 7, 2021 :
    I have op7t.
    After the logkit installation i the *#800# not working.
    Please anyone now what is the problem?

  9. oppo001
    Donut May 8, 2021

    oppo001 , May 8, 2021 :
    Did you di the steps above?

    "Open dialer, type in *#800# (If this doesn't do anything, just google search "Oneplus engineer mode apk", download and install it. Then retry)"

  10. smile80992
    Donut May 15, 2021

  11. ijcy
    Honeycomb Jun 17, 2021

    ijcy , Jun 17, 2021 :
    I tried this but it seems that after the latest update 11.07 PDC won't find the phone again :(

  12. Spartacus 99
    Cupcake Jun 23, 2021

    Spartacus 99 , Jun 23, 2021 :
    Please help. I got as far as the PDC and was lost. I don't know what or where the PDC is. I looked all throughout the start menu (Windows 10) and got nowhere. Google was no help. I'm in the USA with an IN2025 (One Plus 8 Pro) with AT&T, and I'm on Oxygen Can anyone please define, and let me know exactly where to find it, and what I'm supposed to do with it when I get there?? I got all the way to the Chinese startup and was lost from there.
    Thanks so much
    Last edited: Jun 23, 2021

  13. IISpaniardII
    Donut Jun 26, 2021

    IISpaniardII , Jun 26, 2021 :
    Hi. I did exactly what you did a few times now. But whenever I remove the sim, it goes back to 'Overseas commercial DS' I tried 6/7 times in total. Do you have a fix for that?

  14. Y1625071871720
    Cupcake Jul 8, 2021

    Y1625071871720 , Jul 8, 2021 :
    Is this relevant for the OP 8 5G UW variant at all? So little information out there for the particular model.

  15. DrewWerd89
    Cupcake Jul 20, 2021

  16. xcube
    Gingerbread Jul 25, 2021

    xcube , via OnePlus 9 , Jul 25, 2021 :
    Hi, did all that and VoLTE works but one big problem is that all incoming calls are Unknown cal see any callers ID nor Numbers.

    Any help please?

    Im using OP 9 laters Android 11 version.

  17. saras_gaikwad
    Cupcake Aug 2, 2021

    saras_gaikwad , via OnePlus 7 , Aug 2, 2021 :
    Is it supports OnePlus 7 model too?

  18. IvanoCris
    Cupcake Aug 17, 2021

  19. raaj.roop
    Eclair Aug 29, 2021

    raaj.roop , Aug 29, 2021 :
    you need to enable developer option and usb debuggin option also authorise the computer then only it will turn off

  20. raaj.roop
    Eclair Aug 30, 2021

    raaj.roop , Aug 30, 2021 :

    is this permanent solution or if i remove and reinsert the sim i have to do it again the above said steps