Verizon iPhone 4 users can now download a new firmware upgrade for their CDMA device. iOS 4.2.7 ipsw download is exclusively available for Verizon iPhone 4 users . Apple also released iOS 4.3.2 ipsw for GSM iPhone 4 and other compatible devices . The latest firmware upgrade brings some security and performance fix for iPad 3G users and minor changes to Facetime over previous firmware upgrade 4.3.
To update your device to the latest iOS 4.2.7 , connect it with your computer. Launch iTunes and navigator to top and click on Help . In the drop down menu select Check for Updates . Click on the available update option and upgrade your device to iOS 4.2.7 .
Alternatively you can download 4.2.7 ipsw files on your computer and update using it .
Download 4.2.7 ipsw : Direct download link
Other Useful Link : 4.3.2 ipsw download for iPhone 4 3GS iPod Touch 4 3G iPad 1st 2nd generation .