IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 13.3.1 (17D5050a) for iPhone 6s

Version:	13.3.1
Build:	17D5050a
Signed:	No
Size:	0.16 GB
Release Date:	2020-01-22 18:07:28
Upload Date:	2020-01-19 02:36:40
Release Type:	Beta

Secure download directly from Apple's servers