Download iOS 11.2.1 (15C153) for iPhone 7 Plus (Global)

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 iPhone9,2
iOS Version 11.2.1
Release Date 2017-12-13
Update Date 2024-06-03
Sha1sum
9227b1fa07cd17456f435a51dcff3dccb8238a67
Sha256sum
dbcf24889a0fd1263acbac45794a2ce41bda4964b73d6d987778e57c7e16e074
md5sum
558b63c89cf43e130d8aac6c33489f55
Size 2.75 GB
FileName
iPhone_5.5_P3_11.0_11.2.1_15C153_Restore.ipsw
Status

Download IPSW (2.75GB) Check device info
Release Notes

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

iOS 11.2.1 fixes bugs including an issue that could disable remote access to shared users of the Home app.

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

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