When you download the file with IE (Internet Explorer), it has a zip extension.
You need to change that to .ipsw
(ATTENTION: the right extension is IPSW not ispw !!)
Don’t unzip it. Just change the extension (rename the .zip file in .ipsw).
On a Mac if you read “xxxx.ipsw.zip” delete .zip !
If you don’t want to change the file type to .ipsw, just use different browser such Firefox or Safari from Apple.
!!
iPhone 4 (GSM)
iPhone 4, iOS 4.2.8 (Verizon)
iPhone 3GS
iPad 2 WiFi
iPad 2 GSM
iPad 2 CDMA
iPad
iPod Touch 3G
iPod Touch 4G
You need to change that to .ipsw
(ATTENTION: the right extension is IPSW not ispw !!)
Don’t unzip it. Just change the extension (rename the .zip file in .ipsw).
On a Mac if you read “xxxx.ipsw.zip” delete .zip !
If you don’t want to change the file type to .ipsw, just use different browser such Firefox or Safari from Apple.
!!
iPhone 4 (GSM)
iPhone 4, iOS 4.2.8 (Verizon)
iPhone 3GS
iPad 2 WiFi
iPad 2 GSM
iPad 2 CDMA
iPad
iPod Touch 3G
iPod Touch 4G