Download iOS 15.0.2 (19A404) for iPhone 6s

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 iPhone8,1
iOS Version 15.0.2
Release Date 2021-10-11
Update Date 2021-10-07
Sha1sum
52a42868caad357561c0b81e340d17e762c202d3
Sha256sum
b94be3551a6ffde42bdc4012f3841932aefeec024170f51e482bd711b3b34cfb
md5sum
30048765037cbac3d53063338bbbd9ba
Size 5.01 GB
FileName
iPhone_4.7_15.0.2_19A404_Restore.ipsw
Status

Download IPSW (5.01GB) Check device info
Release Notes

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

This update includes bug fixes for your iPhone:

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

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