Verizon iPhone 4 CDMA comes with iOS 4.2.6 and you can jailbreak Verizon iPhone 4 4.2.6 with GreenPois0n RC5-b4.
We have already posted a guide to jailbreak iOS 4.2.1 untethered using GreenPois0n RC5. You can use the same guide to jailbreak Verizon iPhone 4 iOS 4.2.6.
You will need:
- Verizon iPhone 4 running iOS 4.2.6
- GreenPois0n RC5-b4 for Mac or PC
First backup your Verizon iPhone 4 using iTunes
Go to this link: Jailbreak iPhone 4 and start following the jailbreak method from “Step-3”