When prompted, hit the Reset Statistics button to continue. Scroll all the way to the bottom and press the Reset Statistics button. If one is using an excessive amount you may consider disabling its access to cellular data. You can also scroll down to see how much cellular data has been used for each application that is installed on your device. Scrolling down we can see how much time has elapsed during the current period and how much cellular data and roaming data has been used. Tap to launch Settings from your SpringBoard. You may want to do this to keep better track of your data usage and make sure you're not going over your monthly data plan. These are instructions on how to reset your cellular usage statistics on the iPhone.
