How to Jailbreak your Iphone 4 with firmware 4.2
1. Plug your Iphone into your computer (mac or PC) and than quit itunes/iphoto/whatever else opens up
2. download greenpoison for mac or PC
(http://greenpois0n.com/)
3. Open the .exe or dmg and run the program
4. click start, than it is important to follow the instructions exactly as soon as each instruction is highlighting follow that instruction for as long as it is highlighted
5. your iphone will look a little crazy DONT reboot it or touch anything it will reboot itself
6. there will now be a "loader" application installed on your Iphone
(I reccomend connecting to wifi for this next step but its not mandatory)
7. open the loader app and click install cydia and then wait for it to install
8. now cydia is installed you can use this to install a wide variety of third party apps
Congratulations your Iphone is now jailbroken!
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