FaceTime calls do use data, and you can check how much through the Settings app on your iPhone or iPad.

Only the Apple Watch Series 3 and 4 (GPS + Cellular) models can use cellular data, provided they have been set up with a supported carrier.

Testing each unit takes months, thanks to the multitude of hours required to charge cars and gather data. We plan on updating this article with new products ... Otherwise, this is an impressive ...