Simply open it up, and install OpeniBoot and iDroid. Once you complete all these steps, you should be able to dual boot into Android or iOS when you start up your iPhone. As always, be sure to BACKUP!

Steps to Install Android on iPhone 2G The process of installing Android on an iPhone 2G involves several steps, each of which must be followed carefully to avoid damaging the device.

What you can do is jailbreak your iPhone and install iDroid, an Android-like OS made for iPhones. But you cannot install Android itself on an iPhone.

Download and install Android 10 on an iPhone? It's possible. With Sandcastle project, you can install Android on your iPhone.