IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 9.9.11.2 (15C5110b) for iPhone X (Global)

Version:	9.9.11.2
Build:	15C5110b
Signed:	No
Size:	2.06 GB
Release Date:	2017-11-17 18:13:32
Upload Date:	2017-11-15 18:50:09

Secure download directly from Apple's servers