Download iPadOS 15.3.1 (19D52) for iPad mini 4 (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 iPad5,1
iPadOS Version 15.3.1
Release Date 2022-02-10
Update Date 2022-02-07
Sha1sum
3e1b087e2362b6933bdccc6cdf2c875c8427dfee
Sha256sum
566c3e6b1201f72209744b2b3c866544692e0ebf40bf1c69e75c3e8812fa0104
md5sum
480af7adca93e0a6ba13b6ca382def10
Size 4.77 GB
FileName
iPad_64bit_TouchID_15.3.1_19D52_Restore.ipsw
Status

Download IPSW (4.77GB) 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