IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 4.0 (15R5371a) for Apple Watch Series 2 (38mm)

Version:	4.0
Build:	15R5371a
Signed:	No
Size:	0.2 GB
Release Date:	2017-08-28 16:53:25
Upload Date:	2017-08-26 17:01:38

Secure download directly from Apple's servers