Wifi calling not working

[Ryannavy]

My wifi calling on my s20 stopped working.

I've reset network setting and restarted my phone. Nogo.

Reset the wifi router. Nogo. 

Reset application settings. Nogo. 

Everytime I've tried to turn it back on, I get a pin wheel stating "loading this may take a few moments". 60 seconds later I get a notification stating "please try to set up wifi calling later".

I've checked for updates. Nothing new on my phone. It worked great in the past up until today. 

[AbhishekPuri]

clear cache partition
Step Clear Cache Partition

step 1

Turn off your phone ...Connect your phone to laptop/pc with a type-c cable.

step 2

Press Volume up and power button (also press bixby button if present) at the same time .
step 3

Keep it pressed until samsung logo appears on your phone.
step 4

Then a list of your options will come on your phone..
Go to Clear Cache Partition option by navigating through volume buttons.

step 5

After selecting Clear Cache Partition option,then click power button once.
step 6

Once Cache is cleared you will be taken to first option..Then again click power button to restart the phone!

[DravinJB]

When I would slide WiFi calling button on, It would just say "Loading, this may take a few minutes", then time out and the button would slide back to off.  Clearing the cache fixed my problem on my Galaxy S20 Ultra 5G. Thank you so much!

[hegdepra]

facing the same issue on s20 plus with jio sim.
until recent oneui 3.1 update, wifi calling was working fine. now all of a sudden stopped working.
tried clearing cache, resetting network settings multiple times but no use.

Update:
With different wifi network wifi calling worked. used it for a while with different network and connected back to original wifi network. now wifi calling is working fine on original wifi network also.

[Samsung_Support1]

Dear Samsung Member,

Greetings from Samsung Customer Support!

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Warm Regards,
Samsung Customer Support