Porting unity Ios iso games to android

Hello I just bought dues ex for my iPhone and it is a very nice and want to play it on my Android. I learned that it was created with unity and heard people Porting Ios (iso) unity game and want to know how to do it. Can someone post a step by step guide how to do it or software? Help would be much appreciated. Thanks
I have unity

You can not port published games, only the project that was used to create the game. The project belongs to the creator of the game and usually is not published since that would allow the recreation of the game. Besides the fact that you probably don’t have the project of the game nor the right to modify / republish it, as far as i know Dues Ex is made with the Unreal engine and not Unity (You probably ment Deus Ex: The Fall).

edit
A lot people seem to forget what you actually buy when you buy a game. You bought a license to use the software for your own. You didn’t bought “the software” itself. You’re usually not allowed to modify, copy or republish the game on your own.