Download iPadOS 8.4 (12H143) for iPad Air (Cellular)

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 iPad4,2
iPadOS Version 8.4
Release Date 2015-06-30
Update Date 2015-06-26
Sha1sum
8198ce8ffb98e97ed75539d1e74f8969c2223c64
Sha256sum
883d90e6640bb98109766e988e31782a4306f149b42c4cbd5db81bbc3e06bc4c
md5sum
bb32ac1840560b67328514d72e51d3b4
Size 1.94 GB
FileName
iPad4,2_8.4_12H143_Restore.ipsw
Status

Download IPSW (1.94GB) Check device info
Release Notes

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

This update introduces Apple Music—a revolutionary music service, 24/7 global radio, and a way for fans to connect with their favorite artists—all included in the redesigned Music app. iOS 8.4 also includes improvements for iBooks and bug fixes.

Apple Music

iBooks improvements and fixes

Other improvements and bug fixes

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

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