question: How to find out which version of iOS you’re using
answer: 
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  This guide will show you how to find the version of iOS on your iPhone or iPad. To use the ExpressVPN iOS app, you will need iOS 15 or above.
  
  To find the version of your iPhone or iPad:
  
  Go to Settings > General.
  Tap About.
  The iOS version is shown next to Software Version.
  