If your iPhone still uses a lot of data, you can take a look at the data usage of particular apps in Settings -> Cellular. This will allow you to take a look at which apps are using the most data on your iPhone and can help you determine whether or not a specific app is responsible for most of the data drain.
Why Should I Look For Problem Apps?
If an app crashes, it may be stuck trying to send and receive data for a prolonged period of time. Usually, closing out of the app will solve this problem.
However, if this problem persists, there may be a software bug or issue within the app itself. If that's the case, you may want to delete the app entirely and look for an alternative.
How Do I Look For Problem Apps?
- Open the Settings app.
- Tap Cellular.
- Scroll down to the Cellular Data submenu, where you'll see a list of your apps and how much data they've used over the Current Period.
- Look for apps that are using multiple GB of data.
- If one of your apps is using lots and lots of gigabytes, it's probably the reason why your iPhone uses too much data.
- KB stands for kilobytes. There are 1000 of these in 1 megabyte, so KB are very small.
- MB stands for megabytes. There are 1000 MB in 1 gigabyte. If an app is only using a small amount of MB, then there probably isn't an issue with the app.
- GB stands for gigabytes. Most wireless carriers measure data plans in GB.
- If you're not sure whether or not an app is using way too much data, you can tap Reset Statistics. Then, check back in a few days to see which apps are using the most data.