Since Apple has released iOS 4.3.3 for iPhone 4 GSM version with a fix for location tracking, an update for Verizon CDMA iPhone 4 has also been released which is iOS 4.2.8. Of course, you can grab this firmware update by clicking the “update” button in your iTunes or instead use the direct link given below to download iOS 4.2.8 IPSW. You’ll need the latest iTunes software installed which you can grab here. Heads up to all jailbreakers; if you want to keep the jailbreak ability, stay away from iOS 4.2.8 till an official announcement from Dev Team is released!
Download iOS 4.2.8 for Verizon iPhone 4 [Direct Link]