Develop Bugs

Enabling VOLTE in Android Nougat

Im using @flashallthetime Stock Nougat Rom. I was using VOLTE earlier before i ran into an area where the Network wasnt available for Jio Network Provider. When i got back to the place where network is available, I found my APN to be missing, so i googled it and create an apn with 'jionet' and that enabled 4G over the network. However I cant seem to find the option to enable VOLTE. I tried using the Testing module *#*#4636#*#* and turning on VOLTE provision flag. But that flag turns off the moment i get back to another screen. I set it on and then restarted the device to find Enhanced VOLTE option in settings, but it wasnt there so i checked the VOLTE provision flag again, and it was turned off. Why would it turn off? How do i enable it? I assume it was working earlier in the @flashallthetime s stock rom, so the rom wouldnt be an issue. What is then?

To Enable VoLTE follow these steps:
Go to settings->more->Cellular Network->Enable enhanced 4G Lte mode

VoLTE toggle missing after Oxygen 4.0.3 update

VoLTE toggle is missing after oxygen latest 4.0.3 update on my op3. checked VoLTE enabled in phone setting *#*#4636#*#*. VoLTE provisioned toggle is turning off after few seconds. from setting this toggle is missing now. no incoming or outgoing through my Jio sim. any solution?

Im in the UK. I still have the setting after upgrading to 4.0.3
Or a possibility that its not supported by your network.

illusion786 said:
Im in the UK. I still have the setting after upgrading to 4.0.3View attachment 4060412View attachment 4060414
Or a possibility that its not supported by your network.
Click to expand...
Click to collapse
Lucky People:good:

rahulbond.007 said:
VoLTE toggle is missing after oxygen latest 4.0.3 update on my op3. checked VoLTE enabled in phone setting *#*#4636#*#*. VoLTE provisioned toggle is turning off after few seconds. from setting this toggle is missing now. no incoming or outgoing through my Jio sim. any solution?
Click to expand...
Click to collapse
1-did you check *#*#4636#*#* whethere the volte flag is on,
2-also check in sim & network settings , under settings, whether the use volte when available is toggled on.
3-might also be temporary network issue in your area
4-reboot

Manav__25 said:
1-did you check *#*#4636#*#* whethere the volte flag is on,
2-also check in sim & network settings , under settings, whether the use volte when available is toggled on.
3-might also be temporary network issue in your area
4-reboot
Click to expand...
Click to collapse
Hi,
All check. Nothing worked.
Within *#*#4636#*#* VoLTE toggle turns off after few seconds every time I enable it.
No VoLTE enabled toggle in sim and network settings.
I can only browser 4G internet but can't make or get any call or sms also.
Also wiped cache. Did factory reset too. Did N number of tricks available over internet. Even did factory reset but still it is not working.
This problem suddenly arised after upgrading to Oxygen 4.0.3

Manav__25 said:
1-did you check *#*#4636#*#* whethere the volte flag is on,
2-also check in sim & network settings , under settings, whether the use volte when available is toggled on.
3-might also be temporary network issue in your area
4-reboot
Click to expand...
Click to collapse
illusion786 said:
Im in the UK. I still have the setting after upgrading to 4.0.3View attachment 4060412View attachment 4060414
Or a possibility that its not supported by your network.
Click to expand...
Click to collapse
I'm using Reliance Jio since last few months but it was working fine. Problem occurred only after upgrade to 4.0.3

I got the toggle in 4.0.3. It's under "Sim and network settings" check if you have this

rahulbond.007 said:
VoLTE toggle is missing after oxygen latest 4.0.3 update on my op3. checked VoLTE enabled in phone setting *#*#4636#*#*. VoLTE provisioned toggle is turning off after few seconds. from setting this toggle is missing now. no incoming or outgoing through my Jio sim. any solution?
Click to expand...
Click to collapse
I am running 4.0.3 with Jio sim and I have VoLTE. From your screenshots, it is obvious that it is missing for you.
Did you update via OTA? If so, clean flash the full ROM and check. OTA updates especially for the OP3 are buggy, I don't know why. Mine is a clean flash of full ROM.

rahulbond.007 said:
VoLTE toggle is missing after oxygen latest 4.0.3 update on my op3. checked VoLTE enabled in phone setting *#*#4636#*#*. VoLTE provisioned toggle is turning off after few seconds. from setting this toggle is missing now. no incoming or outgoing through my Jio sim. any solution?
Click to expand...
Click to collapse
Hi all,
I have found the solution. It's nothing to do with android or oneplus 3 or oxygen update. I did everything but the stupid sim is faulty. Took my friend's sim card of same service and it just worked fine. Will change my sim card with new one. Will see how it works. Thanks to everyone for their support.

VoLTE icon found
My husband too lost the icon on his OnePlus 3T phone after the update n my solution to his new problem turned out to be quite easy. If you too are trying to get the VoLTE icon back, then try this also:
Settings > Status Bar (under customization section) > enable VoLTE option.
I hope it works for you
PS> Wives rock!

Hi
I am fowzan from Sri lanka and i have same problem too my OP3, I tried clear wipe and data but still has same problem... any other solutions?
---------- Post added at 08:07 AM ---------- Previous post was at 07:50 AM ----------
rahulbond.007 said:
Hi all,
I have found the solution. It's nothing to do with android or oneplus 3 or oxygen update. I did everything but the stupid sim is faulty. Took my friend's sim card of same service and it just worked fine. Will change my sim card with new one. Will see how it works. Thanks to everyone for their support.
Click to expand...
Click to collapse
Hi
I have a same problem after updating to Oxygen 4.5.1 and few days ago changed my sim, did factory reset, did clear wipe data and cache but Still same problem. any other solution plzz..?

rahulbond.007 said:
VoLTE toggle is missing after oxygen latest 4.0.3 update on my op3. checked VoLTE enabled in phone setting *#*#4636#*#*. VoLTE provisioned toggle is turning off after few seconds. from setting this toggle is missing now. no incoming or outgoing through my Jio sim. any solution?
Click to expand...
Click to collapse
Flash Oreo & it's comback..... it's worked for me......hole it's helpful for u

Volte issue on my Z2 Plus phone

I am using Z2 plus from about 15 months with Jio sim with VOLTE enabled without any issues. Suddenly VOLTE has stopped working. Toggled VOLTE, toggled data/airplane mode, tried multiple restarts but VOLTE is not working. Data (internet) is working w/o any issue but I can't make/receive calls as VOLTE is not working. Appreciate if somebody can offer any solutions.

Im also facing the same issue from today(15/8/2018 IND Independence day).
I flashed tons of ROMs and still the problem persists.
Please find a FIX for this.

It has happened many times to me. Try these steps :
1. Eject the SIM tray
2. Interchange the SIMs
3. Let the network bars appear.
4. Turn off the phone
5. Interchange the SIMs again
6. Start the phone
It works :fingers-crossed:

madhurjajoo said:
It has happened many times to me. Try these steps :
1. Eject the SIM tray
2. Interchange the SIMs
3. Let the network bars appear.
4. Turn off the phone
5. Interchange the SIMs again
6. Start the phone
It works :fingers-crossed:
Click to expand...
Click to collapse
Thanks madhurjajoo but this doesn't work for me. I also suggest that you try toggling airplane mode on/off next time you face the issue. So far that's solution that worked for me when VOLTE stops working but nothing working this time.

Vinay Chaudhari said:
I am using Z2 plus from about 15 months with Jio sim with VOLTE enabled without any issues. Suddenly VOLTE has stopped working. Toggled VOLTE, toggled data/airplane mode, tried multiple restarts but VOLTE is not working. Data (internet) is working w/o any issue but I can't make/receive calls as VOLTE is not working. Appreciate if somebody can offer any solutions.
Click to expand...
Click to collapse
I have faced this problem for a lot of time. In the end, i installed stock rom again via mi flash tool - Zui v2.5 (you will easily get the link in xda). Once i got HD symbol and tested a call, i clean wiped the phone and installed custom rom again which supported volte. But before starting the rom for first time, i flashed baseband v1.7 (which i think is of zui 3.5). I got volte after 5-6 months and I'm happy.... My current rom AospExtended Oreo based doesn't have great battery backup but atleast I'm content with VoLTE. Hope it helps

Question New to Poco F3 and flashing LineageOS microg

I just bought a Poco F3 to replace my Pixel 2XL (lineageOS 18.1 microg)
Anyhow, while I wait for the 7days counter, I wanted to see if tI should wait until Android12 MIUI 13 is officially released. This way I can get any firmware updates, etc... before upgrading to a custom rom.
Is waitting worth it to flash and upgrade everything before the change? Normally I wouldn't bother, but when I was testing the phone, I wasn't able to get data to work until I forced it to 3G only.... I was reading this is because of some weird voLTE issue and it needs to be turned off...
Is it likely that a firmware update bundled into the Android12 MIUI13 update will fix this?
Thanks!
Link to Issue and Resolution
ok, for anyone having the same issue, was able to replicate and verify the suggested fix.
The issue seems to happen when there is a mismatch between VoLTE support of the line and the phone.
If you don't have VoLTE enabled on your line but have it enabled on the phone settings, it seems some VoLTE specific queries happens during tower handover which then fails resulting in a kernel panic (F3 bug) which causes the modem to just reboot (losing internet for 10~15 seconds) or for the whole phone to reboot (depending on the firmware on the phone).
The fix is, to either call your carrier and make sure VoLTE is enabled, or just disable VoLTE on your phone (for lineage it's under "Settings" -> "Network & Internet" -> "Mobile Network"). I have confirmed that disabling VoLTE on lineage works and I no longer get the location-specific reboots I got when I enabled it a few weeks ago.
Click to expand...
Click to collapse

Question Not able to call and not receiving calls

My POCO F3 8GB/256GB suddenly not letting me call anyone (Says mobile network not available) or pick up any calls but mobile network and texting is working completely fine. I've rebooted the phone multiple times, disabled volte, reinstalled google carrier services and still nothing so I had no choice but to factory reset the phone but that didn't work too. Currently using MIUI 13.0.9 and hoping there's a way to fix this asap.

PaRoAh said:
My POCO F3 8GB/256GB suddenly not letting me call anyone (Says mobile network not available) or pick up any calls but mobile network and texting is working completely fine. I've rebooted the phone multiple times, disabled volte, reinstalled google carrier services and still nothing so I had no choice but to factory reset the phone but that didn't work too. Currently using MIUI 13.0.9 and hoping there's a way to fix this asap.
Click to expand...
Click to collapse
Use miui flash tool to reset your phone to he miui version it came from. If it does ot work then, it's a hardware problem.

Wmbruckner said:
Use miui flash tool to reset your phone to he miui version it came from. If it does ot work then, it's a hardware problem.
Click to expand...
Click to collapse
I'll try doing the MIUI Flash method. I hope it's not a hardware problem because everything was working fine and I only realised few days ago it started to not work

Check with other sim. If problem remains check different network modes 2G/3G/LTE.

engage4 said:
Check with other sim. If problem remains check different network modes 2G/3G/LTE.
Click to expand...
Click to collapse
So I've tried using 2 different sim cards (One of them being the same carrier as the sim that's not letting me make or receive calls on the F3) and so far those sims are working fine with the phone . Also tried putting the not "working" sim on other devices and it seems to work fine so I'm not really sure what's the problem here. As soon as I put the sim card back on the F3 it works for a moment then completely stops letting me call and receive calls.

Try changing network modes.

engage4 said:
Try changing network modes.
Click to expand...
Click to collapse
That method also didn't work

did you try downgrading to 13.0.8.0 fw? could be a defective modem driver

Try manual network selection. If fails probably hardware.

PaRoAh said:
My POCO F3 8GB/256GB suddenly not letting me call anyone (Says mobile network not available) or pick up any calls but mobile network and texting is working completely fine. I've rebooted the phone multiple times, disabled volte, reinstalled google carrier services and still nothing so I had no choice but to factory reset the phone but that didn't work too. Currently using MIUI 13.0.9 and hoping there's a way to fix this asap.
Click to expand...
Click to collapse
I'm getting Location unavailable too on Firmware 13.0.9, revert back to Firmware 13.0.8, and the location is okay again. Maybe you can revert to Firmware 13.0.8, don't think too far first.

Try to enable volte and vowifi. I had the same problem to my device and it is working