“Software Update Failed An error occurred downloading iOS 16.5” on iPhone 11

Anytime I try updating my iPhone 11 to the latest version , this pops up “Software Update Failed An error occurred downloading iOS 16.5”. Please help.



[Re-Titled by Moderator]


iPhone 11, iOS 16

Posted on May 27, 2023 05:19 PM

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Question marked as Top-ranking reply

Posted on Sep 24, 2023 11:14 AM

Follow the guidance in the Best Answer at the top of this page.


12 replies

May 27, 2023 05:20 PM in response to y__fosy

To update over the air from the phone all of these requirements must be met:

  • You need at least 10 GB of free storage for iOS 16 or 6 GB for iOS 15 or lower; more is better
  • You must be connected to a Wi-Fi network (and not a personal hotspot) unless it is an iPhone that supports cellular 5G (12, 13, 14 or SE 3rd edition) and has a 5G network connection
  • The phone must be charged to at least 50%, and preferably plugged in so it stays above 50% during the update
  • The phone must not be in Low Power Mode
  • The phone must not be connected through VPN, and it may be necessary to delete any VPN apps and VPN profiles
  • The phone cannot be in Airplane mode and must have a cellular data connection
  • You cannot still have a beta of a previous version installed on the phone
  • You cannot have a previous version that was downloaded, but not installed - go to Settings/General/iPhone Storage to look; if you find an iOS installer, delete it


If you can't meet all of them you can still update using your computer.

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“Software Update Failed An error occurred downloading iOS 16.5” on iPhone 11

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