Download iPadOS 8.1.3 (12B466) for iPad 4 (Global)

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 iPad3,6
iPadOS Version 8.1.3
Release Date 2015-01-27
Update Date 2015-01-19
Sha1sum
337b91637478cbda9d4af3da29639a2f3383823d
Sha256sum
84ff333211dda24835fc3b8b6f378d323d91191a968d1b7c32317b5c6c9b9435
md5sum
d4400b45561186e124fb1a33873126b7
Size 1.71 GB
FileName
iPad3,6_8.1.3_12B466_Restore.ipsw
Status

Download IPSW (1.71GB) 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, increased stability and performance improvements, including:

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

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