Wifi calling not working after one ui 4.0 upgrade

[Gops24]

Iam using unlocked Samsung S21 ultra bought in USA. After UI 4.0 upgrade, iam unable to use VoLTE and WiFi calling. 

Can anyone help me to resolve this problem?

[Prashanth25]

Even I have the same issue with wifi calling.

[prateekmahnot]

Same issue.

[Jitu0107]

Same issue

[Abbyk]

Is the issue solved?

[Abbyk]

Samsung has released new update did the issue fixed?

[Gops24]

I didn't get any update yet. Last update I received on December 10

[Abbyk]

Was the issue fixed in dec 10 update?

[Gops24]

Nope. It still exists

[cs-member13]

Dear Samsung member,

Greetings from Samsung customer support.

Thank you for sharing your concern. And please follow the easy troubleshooting steps which might help to solve the issue.
Check device settings
Please follow the below steps.

Go to Settings

Select General management

Select Reset

Select Reset network settings

Select Reset settings

Select Reset to confirm

You'll need to register your Wi-Fi again

Go to Settings

Select Connections

Select Wi-Fi

Select the Wi-Fi network you were connected to

Re-enter the password

Select Connect

In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support