Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 15.3.1 (19D52) for iPhone 7 (GSM)

Version:	15.3.1
Build:	19D52
Signed:	No
Size:	5.38 GB
Release Date:	2022-02-10 19:12:23
Upload Date:	2022-02-07 23:13:14
SHA1:	31c8da384b3e5bc07546c512d670c0452d36c8f1
MD5:	cfa34e4b9a5b19333bf82603af629d80
SHA256:	e61fbceef506092cdcea2d1937b4c5842b636bf98426ca46a9127bbf9dbabe88

Secure download directly from Apple's servers

IPSW Portal