Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 11.4.1 (15G77) for iPhone 6+

Version:	11.4.1
Build:	15G77
Signed:	No
Size:	2.73 GB
Release Date:	2018-07-09 17:08:44
Upload Date:	2018-06-30 04:51:57
SHA1:	06dc5df272b54c6617d54f8095461ebfd419af70
MD5:	1f323d846007af8078847628bf9239ba
SHA256:	2246ce8f759f66db2b9a01cc4e4be1b709eba1807197a7fb89b8ae324369c86c

Secure download directly from Apple's servers

IPSW Portal