Download iPadOS 15.3.1 (19D52) for iPad mini 6 (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 iPad14,2
iPadOS Version 15.3.1
Release Date 2022-02-10
Update Date 2022-02-07
Sha1sum
715e9206c6ecf8875b3d7adfe7c21ee612f7e774
Sha256sum
8a3377eaaeda530badb78086c9b06a4366422f8ac0a1249a6a48e79d7c4e3248
md5sum
2c2c4070aa3848f5739c0c5dc29906b9
Size 5.56 GB
FileName
iPad_Fall_2021_15.3.1_19D52_Restore.ipsw
Status

Download IPSW (5.56GB) Check device info
Release Notes

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

iPadOS 15.3.1 provides important security updates for your iPad and fixes an issue that may cause Braille displays to stop responding.

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222