By Nick Mediati
If you, like many of us, have a limited cellular data plan, monitoring your data usage is essential. Between iOS’s built-in tools and apps from carriers, though, you have several options for monitoring your data usage.
Check through your carrier
Checking your data usage through your carrier is perhaps the easiest and most precise way to go. The four major U.S. carriers each offer an iOS app for their subscribers, and each of those apps lets you see your data usage for your current pay period. You can find apps for AT&T, Verizon, Sprint, and T-Mobile in the App Store.
Read more here:: How to check your data plan usage on your iPhone