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Can’t install iOS 15.1

I have iPhone 6s and I’ve been using iOS 13.4 and new software update is iOS15.1, I have downloaded the update but cannot install it. There’s an error appearing when I try to install it. What could be the problem?

iPhone 6s, iOS 13

Posted on Oct 28, 2021 8:14 AM

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Question marked as Top-ranking reply

Posted on Oct 28, 2021 8:18 AM

If you still can't install the latest version of iOS, try downloading the update again:

  1. Go to Settings > General > [Device name] Storage.
  1. Find the iOS update in the list of apps.
  1. Tap the iOS update, then tap Delete Update.
  1. Go to Settings > General > Software Update and download the latest iOS update.

If you don’t see the update in the list of apps or if the issue happens again, you need to update your device with iTunes.

Try updating iOS after each step.

  • Try Forget the WiFi network and add again
  • Try another WiFi network 
  • Toggle sets automatically off and then on
  • Reset your network settings
  • Force restart your device
  • Remove any beta profiles, if applicable
  • If everything fails: - Use iTunes or Finder (for MacOS Catalina+) to update your device instead of over-the-air


1 reply
Question marked as Top-ranking reply

Oct 28, 2021 8:18 AM in response to anele08

If you still can't install the latest version of iOS, try downloading the update again:

  1. Go to Settings > General > [Device name] Storage.
  1. Find the iOS update in the list of apps.
  1. Tap the iOS update, then tap Delete Update.
  1. Go to Settings > General > Software Update and download the latest iOS update.

If you don’t see the update in the list of apps or if the issue happens again, you need to update your device with iTunes.

Try updating iOS after each step.

  • Try Forget the WiFi network and add again
  • Try another WiFi network 
  • Toggle sets automatically off and then on
  • Reset your network settings
  • Force restart your device
  • Remove any beta profiles, if applicable
  • If everything fails: - Use iTunes or Finder (for MacOS Catalina+) to update your device instead of over-the-air


Can’t install iOS 15.1

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