iPhone 2G iOS 3.1.3 Successfully Downgrade to iOS 2.2.1(JB+
iPhone 2G iOS 3.1.3 Successfully Downgrade to iOS 2.2.1(JB+Unlock)
Step 1:Enter DFU mode
Step 2:Use the iREB to let iPhone successfully downgrade
Step 3:Go to iTunes, press "shift" then click "restore", select the iOS 2.2.1 firmware
iPhone will be successfully downgrade to iOS 2.2.1,but it is still unactivated.
Step 4:
IMPORTANT:If your iTunes version is not 8.2.1, Quickpwn won't successfully be opened on Windows.
Please follow the steps below.
Before using the Quickpwn to unlock the iPhone, you need to uninstall the current" Apple Mobile Device Support" on your PC, then download iTunes 8.2.1 setup.exe.
After downloading iTunes 8.2.1 setup.exe, change the file type to" ZIP" .
It will be" iTunes 8.2.1 setup.zip" .
Double click the " iTunes 8.2.1 setup.zip" file, find the "Apple Mobile Device Support.msi" file and install it.
After installing the file, Quickpwn will be successfully opened !
Then you can use the Quickpwn to unlock and jailbreak your iPhone !