IOS Security Response 16.4. 1 (a) paused

The IOS Security Response 16.4. 1 (a) has been in a "paused" state on my iPhone XR for 20 minutes now. It has a good Wi-Fi connection and my iPad completed it's update on the same Wi-Fi network.


There is no information available on what a customer is supposed to do when this happens.

iPhone XR

Posted on May 2, 2023 5:05 PM

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Posted on May 2, 2023 5:19 PM

To update over the air from the phone all of these requirements must be met-I’ve highlighted the most common reasons the update would pause:

  • 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)
  • 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 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.

7 replies
Question marked as Top-ranking reply

May 2, 2023 5:19 PM in response to JustForComment

To update over the air from the phone all of these requirements must be met-I’ve highlighted the most common reasons the update would pause:

  • 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)
  • 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 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.

May 9, 2023 11:52 AM in response to JustForComment

JustForComment,


I apologise for posting this out of context, but I don't know how else to make sure you see this. I came across an old question from a year ago about Apple mail client. I had the same problem you described, and I just found the reason why my client was "unable to verify" whenever the server's legitimate certificate was renewed. The one where you have to remove and re-add account to 'fix'.


All the normal checks to the server would show that the new cert was installed. Still the mail client would insist on showing me the old cert. As if it was magically cached somehow. (btw, it isn't)


The only way I could figure out how to reproduce the problem is by demonstrating three different types of TLS connections to the IMAP server. I found that when you introduce the SNI extension to the initial request it would actually reply with the old cert instead of the new. So two out of three methods worked, just using SNI made it misbehave.


Replace imap.virtualhost.com with your incoming mail server DNS name. Use the server's IP for realhost.com .


SSL/TLS: (works, sends renewed cert)

openssl s_client -connect imap.virtualhost.com:993


STARTTLS: (works, sends renewed cert)

openssl s_client -connect imap.virtualhost.com:143 -starttls imap


SSL/TLS with SNI extension: (broken, sends expired cert)

openssl s_client -servername imap.virtualhost.com -tlsextdebug -connect realhost.com:993



I hope this information will be enough to convince your provider that they need to find their misconfiguration and fix it.

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IOS Security Response 16.4. 1 (a) paused

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