Download iOS 4.2.8 For Verizon iPhone 4
iOS 4.2.8 is available for CDMA iPhone 4 users on Verizon, with iOS 4.3.3 for GSM iPhone 4, iPad 2, iPad, iPod touch 3G/4G to fix the iOS location tracking bug. To update to iOS 4.2.8, connect your iPhone 4 with your computer via USB and start iTunes. You should see a message prompt. Click on “Download and Install” (Mac OS X) or “Download and Update” (Windows) button to get the new firmware 4.2.8.