IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 4.3 (15T5176c) for Apple Watch Series 3 (38mm, LTE)

Version:	4.3
Build:	15T5176c
Signed:	No
Size:	0.13 GB
Release Date:	2018-02-07 18:10:03
Upload Date:	2018-02-01 23:10:16

Secure download directly from Apple's servers