wifi calling in m20

[nafioukhan]

I can not find the wifi calling in my m20. My device's software is fully upgraded. Please help me to solve this problem 

[amanjalwehra]

Which sim you are using bro?

[amanjalwehra]

which sim you are using bro...In India only Jio and Airtel are providing this facility. If you have above connection then try this..
clear the cache and data of wifi calling app and reconnect to wifi network and then again switch on wifi calling.

[Sidhabhi]

https://r2.community.samsung.com/t5/Tech-Talk/VOWIFI-CALLING-AKA-WIFI-CALLING/td-p/3796663

check this post and find your device compatibility..