Ahh ok, i must've misunderstood.
When I have mobile data toggle off, "4g" and "5g" labels also disappear from the top info bar, which makes it look like no carrier stuff is working.
Just to make sure i understand... if I have mobile data off, my phone is still hitting cell towers because mobile data is different from phone calls? Is it using 4g or 5g for phone calls (with mobile data off)?
And if i have airplane mode on and wifi on, then mobile data and phone calls are off?
** i just tried a test... i have it in airplane mode, but have wifi on. I'm still able to place a cell phone call through the phone app. Is this wifi calling?
Is there a way I can tell when i place a call if its using cell data or wifi calling? And if i use wifi calling (with airplane mode on and mobile data off) to place a call, is it going through tmobile cell towers then, or through my router/internet traffic data?