Download iPadOS 8.1.2 (12B440) for iPad Air 2 (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 iPad5,3
iPadOS Version 8.1.2
Release Date 2014-12-09
Update Date 2014-12-05
Sha1sum
a717e231e49f181fa40383a23d4f8fe3c04277e0
Sha256sum
276d55119eecac98389d43b3e41abe5e5419a43cd2b3b1299a445fb2bfcfa030
md5sum
e82966d7b690db8a9cdd7c5250904483
Size 1.90 GB
FileName
iPad5,3_8.1.2_12B440_Restore.ipsw
Status

Download IPSW (1.90GB) Check device info
Release Notes

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

This release includes bug fixes and addresses a problem where ringtones purchased through the iTunes Store may have been removed from your device. To restore these ringtones, visit itunes.com/restore-tones from your iOS device.

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

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