A neat little program that will download any Apple IOS .ipsw, extra features include a detailed description of the .ipsw, as well as what program can jailbreak that IOS, it tells you what baseband it might update your device to and lists many helpful links to applications you may want.
The program is compatible with Mac and Windows.
Supported Devices
Apple TV 2G,
iPad 1G,
iPad 2G Wi-Fi,
iPad 2G GSM,
iPad 2G CDMA,
iPhone 2G,
iPhone 3G,
iPhone 3G S,
iPhone 4,
iPhone 4 CDMA,
iPod Touch 1,
iPod Touch 2,
iPod Touch 3,
iPod Touch 4
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