Download iPadOS 9.1 (13B143) for iPad Air 2 (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 iPad5,4
iPadOS Version 9.1
Release Date 2015-10-21
Update Date 2015-10-16
Sha1sum
e5874fa98e73ba4fa54b4f1fc757785c8652ad10
Sha256sum
813bb14bfdec55c53e20100793bfee9e1c097af59160c400389df50d67aad045
md5sum
5294de9d0f60b809cba0f12ed9113891
Size 1.86 GB
FileName
iPad5,4_9.1_13B143_Restore.ipsw
Status

Download IPSW (1.86GB) Check device info
Release Notes

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

This release includes new features, improvements and bug fixes, including:

For information on the security content of this update, please visit this website:

http://support.apple.com/kb/HT1222