Install
Probably the most easiest way to install Android on an iPhone 2G/3G is via iPhoDroid, which we did cover previously. But the problem with it is; you should have a computer to run the whole process of installing Android on your iPhone 2G/3G. But thanks to Bootlace 2.1, you can now install Android 2.2.1 Froyo on your jailbroken iPhone without needing to connect it to any PC or Mac!
To kick things off, Bootlace 2.1 is only compatible with the following iPhones and iOS':
iPhone 2G running iOS 3.1.2 and 3.1.3.
iPhone 3G running iOS 3.1.2, 3.1.3, 4.0, 4.0.1, 4.0.2 and 4.1.
And the jailbreaking tools which are supported by Bootlace 2.1 are:
PwnageTool
Redsn0w
Blackra1n
1. Jailbreak your iPhone 2G/3G using the steps given in the links above. When you're done, run Cydia from your iPhone's springboard, and add "http://repo.neonkoala.co.uk/" (without quotes) as repository. Tap "Add Source", and then you need to install "Bootlace"
2. From "Bootlace", you need to install "OpeniBoot".
3. Once "OpeniBoot" has been installed, tap on the "iDroid" tab in the bottom row to install iDroid.
4. Once iDroid has been installed on your iPhone, tap the "QuickBoot" tab in the bottom row, followed by tapping on the Android logo, your iPhone will now restart and boot into Android. That's it, you're done! You now have Android 2.2.1 Froyo on your iPhone.
Source, moreinfo and screenshots tutorial in Redmond Pie: http://www.redmondpie.com/install-and...