Greenpoison RC5 4.2.1 Unthetered Jailbreak is Out | Tutorial and Download
Warning: If you own an iPhone 4 and you need a carrier unlock stay away from Greenpoison rc5, because it will upgrade your baseband, making your device impossible to unlock.
Follow the tutorial below to Jailbreak your iPhone, iPad or iPod Touch using Greenpoison RC5 4.2.1 Unthetered Jailbreak
Step 1: Download Greenpoison RC5 [ Links Below]
Step 2: Connect your iPhone, iPad or iPod Touch to your computer, run Greenpoison RC5 and click on “Jailbreak”
Step 3: Follow the instructions prompted to you by Greenpoison RC5 to enter DFU mode
Step 4: Greenpoison RC5 will now start Jailbreaking Unthetered your iPhone, iPad pr iPod Touch running iOS 4.2.1
Step 5 : Once Greenpoison RC5 finishes, your iPhone, iPad or iPod Touch will reboot and you should see and icon named “Loader”
Step 6: Tap on Loader, install Cydia and you’re done!
You have successfully jailbroken unthetered your iPhone, iPad or iPod Touch using Greenpoison RC5 for iOS 4.2.1
Download iOS 4.2.1 for your iDevice here