IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 4.2 (15S5090c) for Apple Watch Series 3 (42mm, LTE)

Version:	4.2
Build:	15S5090c
Signed:	No
Size:	0.18 GB
Release Date:	2017-11-06 18:03:44
Upload Date:	2017-11-02 23:48:26

Secure download directly from Apple's servers