Download iPadOS 9.2.1 (13D15) for iPad 4 (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 iPad3,4
iPadOS Version 9.2.1
Release Date 2016-01-19
Update Date 2016-01-12
Sha1sum
aafa3a860449ce9e1a19db9f755726d7d036f3e8
Sha256sum
0c02554d1ba1fb057a51a350a134853314f071471ef8dbec24d48462ae93575e
md5sum
9554138e319f24c430e0bf85acc954cc
Size 1.55 GB
FileName
iPad3,4_9.2.1_13D15_Restore.ipsw
Status

Download IPSW (1.55GB) 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