[SOLVED] VoLTE not working - OP8T / OP9 - OOS12 Oxygen OS 12 & OOS13 (no root fix needed)

[joe460]

[SOLVED] - Solution found here.
This worked for me on OxygenOS 13 and seems to be permanent, persisting after reboot and SIM swap.

Finally!!! GUIDE To enable VoLTE and VoWifi on OOS 12.1 without root

Hello everyone, finally there is a way to enable VoLte without root You need 2 apps for the process .. Before starting if you have 2 sims make sure you disable the second sim and proceed.. After you finish with the first sim then enable the...

forum.xda-developers.com

Hi PPLs,
Has anyone managed to force VoLTE Calling to be enabled on OOS12? I am using the OnePlus 8T and my wife uses the OnePlus 9. I have had to rollback both phone the OOS11 after testing OOS12 and realising the OnePlus Log Kit app no longer works, therefore no way to enable VoLTE calling.
For now we are holding on to OOS11 (with the Log Kit fix) until we find a fix in OOS12, otherwise we both might be forced to look and another brand of phone, which I really don't want to do.
Just as a side note, I was using a Realme XT which I bought in 2020 which had VoLTE enabled by default as soon as it recognised the SIM, so the network is capable, but I get no support from Vodafone AU as the OnePlus phones are imported as they are not generally sold in Australia. It seems the same story with all Australian carriers.
Also, my main reason for not rooting the phones is since we use them as daily drivers and need to use secure banking apps.
I know a few people have asked similar questions before, however I'm hoping there might be some progress on this soon.

Thank you!

Currently running: OnePlus 8T (KB2000) & 9 on OOS11 - Vodafone Australia

 

[[email protected]]

Hi PPLs,
Has anyone managed to force VoLTE Calling to be enabled on OOS12? I am using the OnePlus 8T and my wife uses the OnePlus 9. I have had to rollback both phone the OOS11 after testing OOS12 and realising the OnePlus Log Kit app no longer works, therefore no way to enable VoLTE calling.
For now we are holding on to OOS11 (with the Log Kit fix) until we find a fix in OOS12, otherwise we both might be forced to look and another brand of phone, which I really don't want to do.
Just as a side note, I was using a Realme XT which I bought in 2020 which had VoLTE enabled by default as soon as it recognised the SIM, so the network is capable, but I get no support from Vodafone AU as the OnePlus phones are imported as they are not generally sold in Australia. It seems the same story with all Australian carriers.
Also, my main reason for not rooting the phones is since we use them as daily drivers and need to use secure banking apps.
I know a few people have asked similar questions before, however I'm hoping there might be some progress on this soon.

Thank you!

Currently running: OnePlus 8T (KB2000) & 9 on OOS11 - Vodafone Australia

Hi. No way. only Root

 

[Rootk1t]

Hi PPLs,
Has anyone managed to force VoLTE Calling to be enabled on OOS12? I am using the OnePlus 8T and my wife uses the OnePlus 9. I have had to rollback both phone the OOS11 after testing OOS12 and realising the OnePlus Log Kit app no longer works, therefore no way to enable VoLTE calling.
For now we are holding on to OOS11 (with the Log Kit fix) until we find a fix in OOS12, otherwise we both might be forced to look and another brand of phone, which I really don't want to do.
Just as a side note, I was using a Realme XT which I bought in 2020 which had VoLTE enabled by default as soon as it recognised the SIM, so the network is capable, but I get no support from Vodafone AU as the OnePlus phones are imported as they are not generally sold in Australia. It seems the same story with all Australian carriers.
Also, my main reason for not rooting the phones is since we use them as daily drivers and need to use secure banking apps.
I know a few people have asked similar questions before, however I'm hoping there might be some progress on this soon.

Thank you!

Currently running: OnePlus 8T (KB2000) & 9 on OOS11 - Vodafone Australia

Actually there is a way, but not straightforward and if you mess up, you can brick your phone.

First of all you need to unlock engineering menu in OOS12 and in MBN section try to enable VoLTE. If after this volte still doesn't work, enable diagnostic ports via engineering menu, and only after via QPST and PDC activate carrier profiles for your region (Vodafone Australia).

P.S: Making it via root is easier, as Volte is enabled via Magisk module, and diagnostic ports for PDC & QPST are enabled via basically two commands in adb.

 

[IAAxl]

Why not try LineageOS 19.1(Android 12)?
Volte works fine out of box.

You just need gapps, magisk and some module to pass safteynet check, then it's all good.

 

[Wolfillete]

Actually there is a way, but not straightforward and if you mess up, you can brick your phone.

First of all you need to unlock engineering menu in OOS12 and in MBN section try to enable VoLTE. If after this volte still doesn't work, enable diagnostic ports via engineering menu, and only after via QPST and PDC activate carrier profiles for your region (Vodafone Australia).

P.S: Making it via root is easier, as Volte is enabled via Magisk module, and diagnostic ports for PDC & QPST are enabled via basically two commands in adb.

Do you have any guide for this?

 

[Mr Hassan]

Secrecy not worki anymore

 

[joe460]

Actually there is a way, but not straightforward and if you mess up, you can brick your phone.

First of all you need to unlock engineering menu in OOS12 and in MBN section try to enable VoLTE. If after this volte still doesn't work, enable diagnostic ports via engineering menu, and only after via QPST and PDC activate carrier profiles for your region (Vodafone Australia).

P.S: Making it via root is easier, as Volte is enabled via Magisk module, and diagnostic ports for PDC & QPST are enabled via basically two commands in adb.

Thank you for the tip! I'm pretty comfortable with digging around like that.
I'll definitely give that one a go in the near future. It's my daily driver at the moment so I need to pick a time or use an old backup phone for a while.
Much appreciated!

 

[joe460]

Why not try LineageOS 19.1(Android 12)?
Volte works fine out of box.

You just need gapps, magisk and some module to pass safteynet check, then it's all good.

Thanks! LineageOS is usually my goto, but in this case it's my daily and I need all the secure banking and similar apps to work.

 

[ghost.ign]

Finally!!! GUIDE To enable VoLTE and VoWifi on OOS 12.1 without root

Hello everyone, finally there is a way to enable VoLte without root You need 2 apps for the process .. Before starting if you have 2 sims make sure you disable the second sim and proceed.. After you finish with the first sim then enable the...

forum.xda-developers.com

 

[joe460]

Finally!!! GUIDE To enable VoLTE and VoWifi on OOS 12.1 without root

Hello everyone, finally there is a way to enable VoLte without root You need 2 apps for the process .. Before starting if you have 2 sims make sure you disable the second sim and proceed.. After you finish with the first sim then enable the...

forum.xda-developers.com

Thank you!
Will give it a go on my wife's OP9 which I've kept on OOS11 because on this.
FYI I recently bought a OP10 Pro EU version and everything works perfectly including VoLTE & VoWIFI.
Looks like maybe the Global versions are having VoLTE issues in Australia on some carriers.
Only just bit the bullet 2 weeks ago with the OP8T and installed LineageOS 20. Works great out of the box.
I might consider re-flashing the stock OOS13 ROM on the 8T just to try this fix too.

 

[joe460]

Finally!!! GUIDE To enable VoLTE and VoWifi on OOS 12.1 without root

Hello everyone, finally there is a way to enable VoLte without root You need 2 apps for the process .. Before starting if you have 2 sims make sure you disable the second sim and proceed.. After you finish with the first sim then enable the...

forum.xda-developers.com

UPDATE: GREAT NEWS! GOT VoLTE WORKING ON 4G & 5G - SOLVED

Thank you so much @ghost.ign !!

I finally got around to unbricking my almost forgotten OP8T KB2005 International Version using MSMDownloaderTool and tried the tweak using the link you provided. It worked!

Best part was, it worked on the current OOS13 and persists after reboot, as well as removing & reinserting the SIM. Very happy!

It's now time to update my wife's OP9 and do the same. Fingers crossed.

Many, many thanks!!!

FYI - For anyone else reading. I found the details to unbrick my OP8T here:

[OP8T][OOS KB05AA/BA/DA] Unbrick tool to restore your device to OxygenOS

Disclaimer: By attempting any of the processes listed in this thread you accept full responsibility for your actions. I will not be held responsible if your device stops working, catches fire, or turns into a hipster and claims to have been...

forum.xda-developers.com

TIP: When installing the Qualcomm drivers on Windows, boot using the Windows start-up option no.7 to allow unsigned drivers. (Knowing that could've saved me a couple of hours.)

 

[redzyy]

Thank you for the tip! I'm pretty comfortable with digging around like that.
I'll definitely give that one a go in the near future. It's my daily driver at the moment so I need to pick a time or use an old backup phone for a while.
Much appreciated!

Hey any workaround to access pdc to change mbn profile on oos12 non root?
I have tried the shizuku and pixelims, but my ims status not registered.

 

[ghost.ign]

Hey any workaround to access pdc to change mbn profile on oos12 non root?
I have tried the shizuku and pixelims, but my ims status not registered.

i think i saw some post related to how to access PDC and that kinda stuff on OOS 12 or 13, i will post it here let me check if it is still there.

 

[ghost.ign]

Hey any workaround to access pdc to change mbn profile on oos12 non root?
I have tried the shizuku and pixelims, but my ims status not registered.

[GUIDE][A11][A12][A13] VoLTE and VoWIFI on custom/stock ROMs with any Carrier

Activate VoLTE & VoWIFI on custom/stock ROMs with any Carrier Yes, yes, I know that this is not the first thread with activation VoLTE and VoWIFI. But my thread will be more convenient and easier to understand. ATTENTION ! ! ! These methods...

forum.xda-developers.com

 

[redzyy]

[GUIDE][A11][A12][A13] VoLTE and VoWIFI on custom/stock ROMs with any Carrier

Activate VoLTE & VoWIFI on custom/stock ROMs with any Carrier Yes, yes, I know that this is not the first thread with activation VoLTE and VoWIFI. But my thread will be more convenient and easier to understand. ATTENTION ! ! ! These methods...

forum.xda-developers.com

Thanks for the response, i checked that thread already, for oos12, they need rooted phone.

 

[warlord2045]

I can confirm that Oneplus 8T (KB2003) on OOS13, using Shizuku and Pixel IMS can activate VOLTE. I am using KB2003_11_F.63 build.

 

[joe460]

I can confirm that Oneplus 8T (KB2003) on OOS13, using Shizuku and Pixel IMS can activate VOLTE. I am using KB2003_11_F.63 build.

I'm unable to confirm, maybe someone else can. I can however suggest that there's is likely no harm trying. I believe it should work across all carrier unlocked models.

Give it a go and report back if you can share.

FYI - since upgrading from OOS11 to OOS13 my model number has changing from KB2000 to KB2005 using the standard OTA upgrade process.