Originally Posted by
Often1
It is ideal or those who have access to wifi but not good cellular coverage. If you don't have unlimited "talk" and care about cellular, just turn it off. As you move away from the wifi network, you will lost connectivity.
A great thing for many people in rural areas.
Sorta. AT&T is requiring VoLTE devices so that if you leave WiFi coverage then it will switch over to the cellular network if there is "HD Calling" available. In general you'd be better off leaving it on. It will just deduct from the bucket minutes if you don't have unlimited.