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Learn how to view data usage on an iPhone running Apple iOS 15. 

 

View data usage by app

  1. From the Home screen, tap Settings > Cellular.
  2. Scroll down to view apps and how much data each one has used.
    • The default view is This Billing Period. Tap Last Billing Period to view the previous month's usage.
    • If you want to stop an app from using data over cellular, tap the switch to turn it off.

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