Released alongside iOS 4.3.4 is iOS 4.2.9 for CDMA based iPhone 4 on Verizon’s network that patches PDF vulnerability in Mobile Safari exposed by the recently released JailbreakMe 3.0 tool by Comex.
If you are planning to keep untethered jailbreak on iOS 4.2.8, stay away from this update as far as possible. Make sure you install PDF Patcher 2 from Cydia which basically closes this PDF hole after untethered jailbreak, giving you the same effect of iOS 4.2.9 on 4.2.8 with fill untethered jailbreak.
For those of you who want to update, simply connect your iPhone to your PC or Mac and start iTunes. When prompted for update, click on “Download and Install” (Mac OS X) or “Download and Update” (Windows) to get on to the new 4.2.9 firmware.
The last major update for Verizon iPhone was iOS 4.2.6, which was released back in February 2011, followed by a minor update iOS 4.2.7, released on April 14, and iOS 4.2.8, released on 4th May 2011.
Download iOS 4.2.9 for CDMA Verizon iPhone 4 (Direct link official from Apple)
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