what does the wifi calling button on my phone do, and why does it need to be on for me to make any calls?

Question

what does the wifi calling button on my phone do, and why does it need to be on for me to make any calls?

In: 7

Answer 1

Second question: why does a wifi call prevent you from using wifi? I remember one time my phone decided to use wifi for a call and I went to look something up online, but it said I couldn’t use the internet while on a wifi call. Also had no clue how to switch it to a non-wifi call.

I don’t remember specifics of the event, just that it seemed extremely odd to me