
Placing FaceTime calls over cellular, especially video, can eat through data quickly if you aren't monitoring them.
Since unlimited cellular data plans are pretty much a thing of the past, most of us keep a watchful eye on our data usage. When it comes to FaceTime, Apple gives you several different ways to check and see how much data FaceTime is using over your cellular network. You just have to know where to look!
Full story from the iMore Blog...