IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 5.1.2 (16S46) for Apple Watch Series 4 (44mm, LTE)

Version:	5.1.2
Build:	16S46
Signed:	No
Size:	0.2 GB
Release Date:	2018-12-06 18:04:58
Upload Date:	2018-11-26 23:39:28

Secure download directly from Apple's servers