IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 5.1.1 (9B206) for iPhone 4 (CDMA)

Version:	5.1.1
Build:	9B206
Signed:	No
Size:	0.77 GB
Upload Date:	2012-04-27 21:40:06
SHA1:	70b736f826335ccefbc9941c3bb5d3b211236461
MD5:	730d2a2c760c3b8267258447ff19a064
SHA256:	9858070c6e36dd013474223a38359d03f4cb60dfb0215c730ef1e0ed536f6404

Secure download directly from Apple's servers