Download iPadOS 9.2.1 (13D15) for iPad Air (WiFi)

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 iPad4,1
iPadOS Version 9.2.1
Release Date 2016-01-19
Update Date 2016-01-12
Sha1sum
e6044aee91bb1658f2b4b66d7b98e4071171a342
Sha256sum
4a02855f47043ad1d32c9ee643204786eeb5763dac23c34d4dd7ccf7ccf596c0
md5sum
4ee902c48f938f4c436b641e58cff9ca
Size 1.79 GB
FileName
iPad4,1_9.2.1_13D15_Restore.ipsw
Status

Download IPSW (1.79GB) Check device info
Release Notes

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

This update contains security updates and bug fixes including a fix for an issue that could prevent the completion of app installation when using an MDM server.

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

https://support.apple.com/HT201222