Can confirm the same behavior on Pixel 6 with Play SIM card - VoLTE works (it actually did without this hack), VoWIFI does not.

Same here with Pixel 6 running on T-Mobile Poland network.

Since Android 13 VoLTE works on Pixel 6 out of the box, but not WiFi Calling.

I followed your instructions and run the script, then switched WiFi Calling on in the app.
WiFi Calling setting appeared right away, however I couldn't force it to work even after few reboots.
On top of that, whenever WiFi Calling is enabled in the device settings, phone can't register for VoLTE and calls are being placed over 3G.

Carrier supports WiFi Calling and I have it enabled on my line (I was using it with iPhone 7 previously).

Thanks!

I had a chance to check the same - with root and Magisk module - the same with Play - VoLTE works, VoWIFI trying to connect as with your application.

@kyujin-cho can you help me with troubleshoot? I can do this on rooted firmware with root access.

Hi! Thanks for the report. Method to retrieve IMS User-Agent value varies by manufacturer. For example, in Pixel, you need to dial ##0702## from default dialer and look up for IMS_USER_AGENT.

On my pixel - stock rom - this code not works -> ##0702## its going as ussd.

On my pixel - stock rom - this code not works -> ##0702## its going as ussd.

@adryb I think it's supposed to be *#*#0702#*#*

Ok on google its:

#MANUFACTURE#_#MODEL#Android #AV##BUILD#

For me on Pixel 6 and Play sim it's
#MANUFACTURE#_#MODEL#_Android #AV#_#BUILD#

I made a lot of tests, on rooted phone too. Tried to capture traffic on phone side - in ipsec tunnel there is sedond tunnel that communicates with operator devces, i see only that fter some handshake(?) operator closes connection.

Its not related to patch.

@adryb Can you post a result of adb shell dumpsys carrier_config with Play SIM?

Sure. Attached.
cc_pixel.log

Thanks. The only difference I can see between Orange PL (working) and Play (not working) is that for Play, "ims" APN is defined in carrier settings. Can you try to add APN "ims" with any name and only APN type set to "ims", other options at default?

Yep! That worked!!!!! IM ABLE TO CALL VIA VOWIFI!!!!

Which line this shows you?

It's not a line from carrier_config. I looked at carrier settings in /system/product/etcCarrierSettings/. You can decode them using protoc --decode_raw. For Play, ims APN is defined for only some bearers, I assume LTE and UMTS and because of this it's not used for IWLAN. If you redefine ims with no bearer, it is used for all network types and makes IMS register over WLAN.

Do you guys have possibility to check this on Plus?

Edit: hmmm, strange, did nothing and VoWiFi started to work too.

Patch is working on Android 14 beta 1
VoWiFi and VoLTE
PL Plus

Hi, I can't configure out Pixel IMS service on Pixel 7 (Virgin mobile PL - now a part of PLAY carrier). I tried with/without ims APN but still without success. IMS status unregistered.

Same here with Pixel 6 running on T-Mobile Poland network.

Since Android 13 VoLTE works on Pixel 6 out of the box, but not WiFi Calling.

I followed your instructions and run the script, then switched WiFi Calling on in the app. WiFi Calling setting appeared right away, however I couldn't force it to work even after few reboots. On top of that, whenever WiFi Calling is enabled in the device settings, phone can't register for VoLTE and calls are being placed over 3G.

Carrier supports WiFi Calling and I have it enabled on my line (I was using it with iPhone 7 previously).

Thanks!

funny thing is that wifi calling on the iphone is a different platform to support than to wifi calling on android

also is this issue relevant now?

@kyujin-cho requesting to close the issue

I'm using nju mobile and WiFi calling doesn't work even after adding the ims apn (nothing phone 2).

Edit: I tried a carrier certified device (Samsung a53) and it still does not work. So my case is not relevant here and I need to contact my carrier's support.

I'm using nju mobile and WiFi calling doesn't work even after adding the ims apn (nothing phone 2).

Edit: I tried a carrier certified device (Samsung a53) and it still does not work. So my case is not relevant here and I need to contact my carrier's support.

Well, how interesting that it's the carrier's issue...

@kszaq Can you help me with my problem? #323

First make sure that it is working with your SIM on another phone. Sometimes operators need VoWiFi to be activated by accepting terms & conditions.

First make sure that it is working with your SIM on another phone. Sometimes operators need VoWiFi to be activated by accepting terms & conditions.

Yes, it it is working. When I try in a different phone, both VoWifi and VoLTE works, but mine only VoLTE. I tried everything today. I appreacite if you could help me

The only thing I can recommend is that you delete "IMS" APN and re-add it, making sure that "bearer" is "not specified" only. If this doesn't work, it is possible that your network operator does not allow your phone to use VoWiFi.

The only thing I can recommend is that you delete "IMS" APN and re-add it, making sure that "bearer" is "not specified" only. If this doesn't work, it is possible that your network operator does not allow your phone to use VoWiFi.

What do I need to mark besides "not specified"? Everything?