Download iPadOS 15.3.1 (19D52) for iPad Pro 12.9-inch (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 iPad6,7
iPadOS Version 15.3.1
Release Date 2022-02-10
Update Date 2022-02-07
Sha1sum
70d37dc418ed0c4202180905c8d6ab6cc67c04a4
Sha256sum
ed8fff420c06cedc28e422c4d82545f98507a40d4b6d030c2603adedadd8e60f
md5sum
517efe119a919d3e8b68b19c42bbf7eb
Size 4.97 GB
FileName
iPadPro_12.9_15.3.1_19D52_Restore.ipsw
Status

Download IPSW (4.97GB) 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