How to Check Data Usage on iPhone

Check your cellular data

1. 1Open Settings and tap Cellular (or Mobile Service).
2. 2Scroll to the section that shows Current Period. That is your total since the last reset.
3. 3Below it, each app is listed with the data it used in the same period. Sort by size by looking for the largest numbers: video, social and music apps are usually on top.
4. 4Scroll to the very bottom to see when the counter was last reset.

Reset the counter on your billing day

iPhone does not reset the count each month on its own. To match your plan, reset it on the day your plan renews:

1. 1Go to Settings > Cellular.
2. 2Scroll to the bottom and tap Reset Statistics, then confirm.
3. 3Set a reminder for the same date next month, so the number keeps matching your plan.

Resetting only clears the counter on your phone. It does not change anything with your carrier, and your carrier's own figure (in its app or on your bill) is the one that decides when your plan runs out.

What iPhone does not show

• Daily totals. There is one running total, not a day-by-day history, so you can't see which day used the most.
• Wi-Fi usage. The Cellular screen counts mobile data only. Wi-Fi is not listed anywhere in Settings.
• Warnings. There is no built-in alert when you pass a limit. Your carrier may send one, but often only when you are close to the end.
• Your other devices. A laptop on your hotspot shows up as Personal Hotspot, with no detail about what it did.

Quick ways to use less on iPhone

• Turn on Low Data Mode in Settings > Cellular > Cellular Data Options. It pauses automatic updates and background tasks.
• Switch off cellular data for apps you only need on Wi-Fi, from the app list on the same screen.
• Stop photos syncing on cellular: Settings > Photos > Cellular Data.
• Turn off Wi-Fi Assist at the bottom of the Cellular screen if you don't want iPhone to fall back to cellular when Wi-Fi is weak.

Want a warning before you run out? iPhone has no data cap setting, but there are ways around it: Can You Set a Data Limit on iPhone? What Works Instead.