Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 11.1.1 (15B150) for iPhone 6

Version:	11.1.1
Build:	15B150
Signed:	No
Size:	2.53 GB
Release Date:	2017-11-09 17:55:34
Upload Date:	2017-11-07 09:14:13
SHA1:	d1f7af40736670432f32059f4e409ac84b42462d
MD5:	b31b1bd3ec3197e9ad0bc9f3b19d7594
SHA256:	d58801c53e3787aaab26a6c277591be4dbb1a7e7b98784efa088254913dbddca

Secure download directly from Apple's servers

IPSW Portal