Download iPadOS 9.1 (13B143) for iPad Air (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 iPad4,2
iPadOS Version 9.1
Release Date 2015-10-21
Update Date 2015-10-16
Sha1sum
26351b0ebae58a2528f8956d45204953f0747b04
Sha256sum
f075828c002a4e8a7176fb0021940becaa22b8b8d0ef00eaa5671d2467ce147b
md5sum
9e65071d236f01339ba463fccb3f5ec5
Size 1.84 GB
FileName
iPad4,2_9.1_13B143_Restore.ipsw
Status

Download IPSW (1.84GB) 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