Under Cellular Data, check the number next to Current Period. If you want to check when the current period for your iPhone data usage tracking began, scroll to the bottom of the screen.

We’ll show you how to check data usage on an iPhone whenever you like with this quick process, and we’ll explain how it can be used to limit your data use. Check your data usage.

If you've got an iPhone, then you've also got the Health app from Apple, which comes preinstalled on it. This app is designed to serve as the central hub for all your health and fitness data, from ...

It’s a good idea to find out how much data your phone is using and which apps may be wasting your data. Here’s how. Here are some easy instructions on how to check your iPhone’s data usage.