Download iPadOS 15.5 (19F77) for iPad Air 4 (Cellular)

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPad13,2
iPadOS Version 15.5
Release Date 2022-05-16
Update Date 2022-05-11
Sha1sum
cb1f03199d3eb55fec317c568810a1ab8a47e3f5
Sha256sum
e1de75517eceaab1a2a3db0641ad499e11002b87264f1b00737c563cb700f7f8
md5sum
3f24813e73fcbd0b848fc208dbc9fa41
Size 5.35 GB
FileName
iPad_Fall_2020_15.5_19F77_Restore.ipsw
Status

Download IPSW (5.35GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

iPadOS 15.5 includes the following improvements and bug fixes:

Some features may not be available for all regions or on all Apple devices. For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222