Download iOS 15.1.1 (19B81) for iPhone 13 Pro

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 iPhone14,2
iOS Version 15.1.1
Release Date 2021-11-17
Update Date 2024-06-03
Sha1sum
82493f2ba07b05b169c7ab5c5e9be27a3b02dc7b
Sha256sum
8166864ab3348c86f29ee2e5ff14b53c29cfd333341e89f622ac4a3fac10040c
md5sum
aaafacabe3ba0441b3dcb67327281ee3
Size 6.14 GB
FileName
iPhone14,2_15.1.1_19B81_Restore.ipsw
Status

Download IPSW (6.14GB) Check device info
Release Notes

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

iOS 15.1.1 improves call drop performance on iPhone 12 and iPhone 13 models.