Download iPadOS 15.3.1 (19D52) for iPad 9 (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 iPad12,1
iPadOS Version 15.3.1
Release Date 2022-02-10
Update Date 2022-02-07
Sha1sum
a3b5190e51715f3e88753f2491d240956cb583ab
Sha256sum
d2fffd06b393ceee48fa2c855393ca6e62fe3d05f3319fd3cf8283b4677bd694
md5sum
fb7714642c694549bf0a52b794fba8c8
Size 5.45 GB
FileName
iPad_10.2_2021_15.3.1_19D52_Restore.ipsw
Status

Download IPSW (5.45GB) 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