How much building data does Apple have

Check mobile data usage on iPhone and iPad

Here you can find out how you can check the extent to which you use mobile data and how you can activate or deactivate mobile data for all or individual apps.

Activate or deactivate mobile data

To turn cellular data on or off, go to Settings, then tap Cellular Network or Cellular Data. If you're using an iPad, you'll see Settings> Cellular Data. If you're using a dual SIM iPhone, you'll need to set one of your plans as your primary data number to see how much cellular data you've used.

Depending on the wireless service provider and device, additional options may be listed under "Mobile data options":

  • "Activate LTE", "Activate 4G" or "Activate 3G". You can choose which network connection you want to use for voice and data transmission. You can learn more about these options here.
  • Activate or deactivate voice roaming: You can deactivate voice roaming for CDMA networks in order to avoid charges for using the networks of other cellular providers.
  • Turn data roaming on or off: When traveling internationally, you can turn off data roaming to avoid roaming charges. If you have an international data plan, you may not be able to turn off data roaming. Learn more about traveling abroad with your iPhone and iPad here.

Depending on the provider, data roaming can also be used when traveling in your own country. Contact your wireless service provider for more information on data roaming regulations that apply to you or other mobile data settings. You can turn cellular data on or off to restrict apps and services from connecting to the Internet over the cellular network. When cellular data is turned on, apps and services use your cellular connection when a Wi-Fi connection is unavailable. It is therefore possible that a fee is charged for the use of certain functions and services via a cellular network. Contact your wireless service provider to find out more about any fees that may apply.


Show used data volume

To see how much data you have used, go to Settings> Mobile Network or Settings> Mobile Data. If you're using an iPad, you'll see Settings> Cellular Data.

Scroll down to see which apps are using cellular data. If you don't want an app to use cellular data, you can turn it off for the app. When mobile data is turned off, apps only use Wi-Fi connections to access data.

To view the usage of mobile data for individual system services, select "Settings"> "Mobile Network" or "Settings"> "Mobile Data". Then scroll to the bottom of the screen and tap on "System Services". Mobile data cannot be activated or deactivated for individual system services.

You can call up the statistics on the data usage of an app for the current period or display app data statistics for those apps that used data while you were logged into foreign networks. To reset these statistics, go to Settings> Cellular or Settings> Cellular Data and tap Reset Statistics.


getting support

  • If you still can't connect to a cellular network, here's what to do.
  • If you use an Exchange ActiveSync account, it may still use cellular data even if you turn them off for Mail and Calendar. To see how mobile data is being used by your Exchange ActiveSync account, go to Settings> Mobile Data> System Services.
  • If the function is activated, the WiFi support automatically switches to the cellular network if the WiFi signal is weak. The "WLAN support" function is activated by default. This can lead to additional use of mobile data, which may incur additional charges depending on your mobile network plan. You can deactivate the WiFi support in the settings. For more information, see About Wi-Fi Support.
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