Wondering just how much data you're pulling down in a given month on your iPhone? There are a few ways to check your usage, one being to head to your provider's websote, log into your account, and you should a detailed graph on how much data you're using. However, another way only requires you and your iPhone to see how much data you're devouring . . .
First, head to your iPhone's settings app. Tap on "Cellular," then scroll down to "Cellular Data Usage." You'll see your data usage (sending and receiving) over the cellular network for the current period, as well as call time in the section above it. Easy, right?