WIfi calling no longer working on android - FAST 5364 firmware SG4K100202

[Wonderingwhy]

I haven't had wifi calling on my Samsung S23 since the firmware on the router was upgraded to v202.  I've tried all the usual router reboots to no avail. Is there a way to rollback the upgrade as I live in a very poor mobile signal area and rely on wifi calling.

[Karl-TalkTalk]

Hi @Wonderingwhy 

Our devices team have an updated firmware to resolve the Wi-Fi caling issue.  Would you be willing to test for us.  If not working, we will roll your router firmware back, so would not take long.

Thanks  

Karl. 

[Karl-TalkTalk]

Hi

That's excellent - thanks for confirming.

Regards,

Karl. 

[Wonderingwhy]

Hi,

Thanks for your help. Yes they have rolled back the firmware and I have wifi calling again.  Yes, Whatsapp is working normally.

[Karl-TalkTalk]

Hi

Our devices team have confirmed they are going to rollback the firmware shortly.

If you do use Whatsapp, can you confirm if whatsapp calls work as expected.

Thanks  

Karl. 

[Karl-TalkTalk]

Hi

I've got the screenshots here - I've removed the one with the phone number visible.

I'll get these to our devices team now.

Karl.

[Wonderingwhy]

Hi,   Thanks for your reply.

I have tried calls with mobile data on and off.  The  screenshots requested are attached, there no wifi calling symbol showing during a call, usually near the signal strength icons in the top right.  I am not trying to make calls through whatsapp.

The calls fail with the message "no mobile network available", which isn't a surprise given wifi calling isn't working.  Same issue with inbound calls, eventually I will get a missed call text when the phone finds enough mobile signal to receive and SMS.

I'm on EE.  OneUI is v6.1 ,  Android v14 , Patch Level 1st August 2024.

[Karl-TalkTalk]

Hi @Wonderingwhy 

Our device manager has also asked if you can confirm what mobile Network you are using.

Thanks  

Karl. 

[Karl-TalkTalk]

Hi

You can also turn off mobile data on your phone and try a test call, then capture a screenshot as below : 

The pic should show the Wi-Fi calling icon.

 

Karl.

[Karl-TalkTalk]

Hi

If possible, can you PM a screenshot from the phone when Wi-Fi calling is failing.  You can usually capture a screenshot by pressing the power button and volume down together.

Thanks  

Karl. 

[Karl-TalkTalk]

Hi

What One UI version and android version is the phone ?

Also, are you making calls over mobile date and not using an app such as whatsapp for calls.

Thanks  

Karl.