Download iPadOS 8.1.3 (12B466) 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 8.1.3
Release Date 2015-01-27
Update Date 2015-01-19
Sha1sum
45f79a764c9a1892f1888753bde96984a1365b50
Sha256sum
42e95539890b01f7f893a5f5cd116aef32b3997351a8521153fa8e6f42dfb061
md5sum
0f1ce6dc8e9cf30e362d20bccca6ee66
Size 1.67 GB
FileName
iPad3,4_8.1.3_12B466_Restore.ipsw
Status

Download IPSW (1.67GB) 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