Download iPadOS 9.0.1 (13A404) 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 9.0.1
Release Date 2015-09-23
Update Date 2015-09-19
Sha1sum
6af78b6c319d188f68a67f8561897a2154457c2a
Sha256sum
b7f4496c2679789d3c08d5185e7095f7b00c79e03677a88d3ebad54a268c41e5
md5sum
dbfff60dd1825626560142ac27f9e1d0
Size 1.89 GB
FileName
iPad5,4_9.0.1_13A404_Restore.ipsw
Status

Download IPSW (1.89GB) Check device info
Release Notes

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

This update contains bug fixes including:

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

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