Download iOS 11.0.2 (15A421) 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 11.0.2
Release Date 2017-10-03
Update Date 2017-09-28
Sha1sum
125322c64004171b2f3aa50b10992787ff7fe28c
Sha256sum
742451d408c31840206afebd22f83147512f3acc4efdb90e308775cf087d7d0f
md5sum
13e2887a0071ec11d31aad329dc460e2
Size 2.47 GB
FileName
iPhone_4.7_11.0.2_15A421_Restore.ipsw
Status

Download IPSW (2.47GB) Check device info
Release Notes

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

iOS 11.0.2 includes bug fixes and improvements for your iPhone or iPad. This update: