IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 4.3.2 (15U5053b) for Apple Watch Series 3 (42mm, LTE)

Version:	4.3.2
Build:	15U5053b
Signed:	No
Size:	0.1 GB
Release Date:	2018-05-30 17:06:48
Upload Date:	2018-05-24 12:40:46

Secure download directly from Apple's servers