Can you install any other software, other than IOS, on an iPhone?

I'm just curious if you could install any other software, other than ios, on your iPhone like windows 8 phone without dream board and things similar to that.

Unfortunately, no. You can do something called jailbreaking your iphone which basically just unlocks the settings on your phone so that you can have extra customization options like changing the carrier logo, changing your lock screen and stuff like that. Hope this helped!

No, and I can't think why you would want to. The hardware and software go hand in hand to make it more efficient.

First of all you have to Jailbreak your iPhone and then there are some apps and tools by using which you can change your whole gui.