iPhone SE (2022) How much cellular data does Facetime use?

[timelessbeing]

And why does it say 0kb used?

 

[MarkX]

I'd hazard a guess that as you are on Wi-Fi it won't have used any data.

 

[JPack]

I see that bug as well. Should be a couple hundred MB per hour.

 

[timelessbeing]

I was on an isolated residential street, so unlikely to be wifi.

But when you're on wifi, it doesn't tell you how much it uses?

 

[arw]

But when you're on wifi, it doesn't tell you how much it uses?

It should. Seems like a bug. But I see a lot more traffic (and better quality) on WiFi than on mobile data.
On WiFi I see ~4,5 Mbit each for upload and download.
Resulting in ~4 GB/hour in total traffic for each device.
iPhone SE 2020 FaceTime to iPhone SE 1st gen:

 

[arw]

Ok, since updating from iOS 15 to 16.4.1, I'm seeing the same bug on my 2020 SE.