iPad Air (4th generation) recovery mode, Error 1109 on update/restore.

iPad Air (4th generation) stuck in recovery mode – Error 1109 (06B4.0000) on both Update and Restore

Device: iPad Air 4 (64GB), was on iPadOS 26.0, updating to iPadOS 27.

What happened:

- iPad storage was nearly full (System Data ~22GB, ~5GB free), so I updated through Apple Devices on Windows.

- At about 40% on the iPad's progress bar, it fails with: "The iPad could not be updated. An unknown error occurred (1109). 06B4.0000"

- iPad is now stuck in recovery mode.

- Restore also fails with the same error (1109) at the same point.

What I've tried:

- Two different Windows computers (desktop + laptop), both with Apple Devices app, plenty of free space (36GB+)

- Two different networks: home LAN and phone mobile hotspot

- Corrected the laptop's date/time and synced it

- Tried Update and Restore several times – always fails around 40% with 1109

- Could not get into DFU mode

I have an iCloud backup and am okay with restoring, but even Restore won't complete. Has anyone fixed error 1109 when it happens on multiple computers and networks? Could this be a hardware issue?

Posted on Oct 26, 2026 7:25 AM

1 reply

LotusPilot

Level 10 (334,506 points)

Oct 26, 2026 7:56 AM in response to Joseph_Sripraparkorn

Error 1109 is documented within this Apple Support page:

If you see Error 3194, Error 1109, or other network connectivity errors when restoring your iPhone or iPad - Apple Support

A network firewall or other security software installed on your computer might block access to Apple's back-software servers. Where installed, these may need to be temporarily disabled, bypassed or removed entirely. If the issue os common to many computers on your network, your infrastructure firewall and associated network security measures are prime candidates for investigation.

You may need to seek assistance from your IT Department and/or your network security team.