In case your iPhone is using too much data, you may want to take a look at the Apps using cellular data on your iPhone and Disable Cellular Data for specific Apps on your iPhone.
Disable Cellular Data For Specific Apps on iPhone
Most smartphone users are on limited data plans and exceeding the data limit can be very expensive. Hence, it is necessary that you disable all the Unnecessary Apps from using Cellular Data on your iPhone.
Disabling Cellular Data for specific Apps on iPhone is easy and there is no need to use any Third Party App to do this job for you.
1. Open Settings > tap on the Cellular.
2. On the next screen, you will see listing of Apps using Cellular Data on your iPhone.
Go through the list of Apps consuming Cellular Data on your iPhone and disable Cellular Data for specific Apps by moving the Toggle to OFF position (See image above).
In the above example, we have disabled Cellular Data for Facebook App. In general, you are better off disabling Cellular Data for all Social Media Apps and other non-essential Apps to get the most out of your limited Data Plan.
After disabling Cellular Data for specific Apps, you may occasionally find some of these Apps giving error messages as they try to connect to Cellular Data on your iPhone.
However, this problem generally goes away when you allow the Apps to refresh in the background using the WiFi Network.
1. Open Settings > tap on General.
2. On the next screen, tap on Background App Refresh.
3. On the Background App Refresh screen, you can allow necessary Apps to Refresh in the Background by moving the toggle next to these Apps to ON position.
With this setting only the Apps that you deem necessary will be connecting to internet in the background on your iPhone using WiFi network.