Download iPadOS 11.3.1 (15E302) for iPad Pro 9.7-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 iPad6,3
iPadOS Version 11.3.1
Release Date 2018-04-24
Update Date 2018-04-14
Sha1sum
f5a659e8356d1d70d6ba63597864b9e84c1877e5
Sha256sum
a8fdbd4177bb99344a3b4f738d695146b551a13dc45892206c1f1fea8d79a58f
md5sum
4435d893b29ddef8ac58a1b2307027a7
Size 2.41 GB
FileName
iPadPro_9.7_11.3.1_15E302_Restore.ipsw
Status

Download IPSW (2.41GB) Check device info
Release Notes

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

iOS 11.3.1 improves the security of your iPhone or iPad and addresses an issue where touch input was unresponsive on some iPhone 8 devices because they were serviced with non-genuine replacement displays.

Note: Non-genuine replacement displays may have compromised visual quality and may fail to work correctly. Apple-certified screen repairs are performed by trusted experts who use genuine Apple parts. See support.apple.com for more information.

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

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