wi-fi calling, esim / dual-sim and international use (overseas)
Hi, sorry if this question already discussed here biut please help to understand:
i.e. I have dual sim iphone where eSim is ATT and physical slot given to local foreign sim card.
I found that: https://www.att.com/features/wifi-calling/ - While traveling in many countries outside the U.S., your phone will automatically use the Wi-Fi network instead of a mobile network when both are available. (Wi-Fi Calling is restricted in some countries.)
Does this mean:
1. If i have local foreign sim card , while there, as p[romary for both data and voice and text and if my phone is in wifi network the att-wi-fi will take over and call will be free of roaming charge?
2. same scenario - no wi-fi - will be the att wi-fi calling using data plan from local non-att sim?
How does it work?
Also - if there an app that allows wi-fi calls over wi-fi for iphone?
The idea is to minimize roaming charges while abroad.