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Key Takeaways

  • "Current Period" in the cellular data settings on your iPhone refers to the amount of data you've used in your billing cycle or since the last reset.
  • If you have many apps installed, remember to scroll to the bottom of the list to see when the current period statistics were last reset.
  • Current Roaming Period refers to the data used while connected to another cellular network.

If you're looking at your cellular data usage in the Settings app on your iPhone, you might notice data usage statistics from a "Current Period." But what exactly is the current period, and when did it start? Here's how to find out.

How to Check Your Current Period

First, we'll assume you've already navigated to Settings > Cellular on your iPhone. If not, open the Settings app and tap "Cellular" in the list.

In iPhone Settings, tap "Cellular."

Below a bank of options near the top of the "Cellular" settings page, you'll see a section titled "Cellular Data." At the top of that, you'll see "Current Period" with a cumulative data count beside it. This is how much cellular data you've used in total during the current period.

If you've never checked this statistic in Settings before, this number can look frighteningly large. So the big question remains: How long is this current period, and when did it start?

The "Current Period" stat in iPhone Cellular settings. What is the current period?

It turns out that, on some cellular carriers, this "Current Period" is tied to your actual cell phone billing cycle. On other carriers, the "Current Period" is an arbitrary length of time since you last reset your cellular statistics.

If you have hundreds of apps installed on your iPhone, you might never notice that you can scroll all the way to the bottom of the app list and see the date when the "current period" statistics were last reset.

At the bottom of Cellular settings, you'll see the date the current period started.

To reset the statistics for the current period, tap "Reset Statistics."

You'll lose all your stored cellular data statistics, and the counts will reset to zero.

Tap "Reset Statistics" to reset your iPhone cellular data and call time statistics.

With a tap of "Reset Statistics," a new "Current Period" has just begun. Check back in Settings > Cellular over time to see your statistics and which apps are using the most data. Good luck!

What Does Current Roaming Period Mean?

Current Roaming Period exclusively refers to the data you have used while connected to another cellular network (roaming) other than your own. The value you see will typically be low — on the order of kilobytes — unless you happen to have visited a location where your typical cell service provider isn't available. If you are roaming frequently you may notice an increase in your monthly bill, as roaming data sometimes results in additional fees. There are also usually limitations imposed by the network you're roaming on, resulting in slower speeds and worse overall performance.

You can disable roaming entirely by going to Settings > Cellular > Cellular Data Options, and toggling "Data Roaming" to the off position.

The data roaming toggle.

Your Current Roaming Period data will be reset along with your regular Current Period data when you hit the "Reset Statistics" button.