Make phone calls with Wi-Fi when you have little or no cellular coverage.
Vodafone Idea users with iPhones running iOS 14.5 receive Wi-Fi
HCS Technology Group - HCS Blog - Wi-Fi Calling and Wi-Fi Assist
iPhone User Guide - Apple Support
Call with Wi-Fi Calling - Apple Support
Wifi Calling not Showing and not working - Apple Community
Using Dual SIM with an eSIM - Apple Support
Incredibly useful feature that many do not know exists: Make and
iOS 17.2.1 Update - Multiple Issues there… - Apple Community
If you see No Service, Searching, or SOS on your iPhone or iPad
Apple iPhone 11 - Wi-Fi Calling - AT&T
Wi-Fi calling intermittent but mostly not… - Apple Community
Apple iPhone 6 / 6 Plus - Wi-Fi Calling - AT&T
Kinta Wi-Fi