Download iPadOS 15.2.1 (19C63) for iPad Pro 4 (12.9-inch, 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 iPad8,12
iPadOS Version 15.2.1
Release Date 2022-01-12
Update Date 2024-05-17
Sha1sum
7071082e17898edeba753b9f1a3d9e0b6b6f55ca
Sha256sum
eaa1e54626baf4a753129ebc98b4399ea4beafb7344b6a9d6c453b123b73eb79
md5sum
fa7ddca3b3b304ff901db8549705ca23
Size 6.08 GB
FileName
iPad_Pro_A12X_A12Z_15.2.1_19C63_Restore.ipsw
Status

Download IPSW (6.08GB) Check device info
Release Notes

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

iPadOS 15.2.1 contains bug fixes for your iPad including the following:

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

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