Currently you’re stuck with what a manufacturer provides for you, but it doesn’t have to be this way, not should it!

Most phones sold today are smartphones. These phones are nothing more than computers that have been designed to be able to make calls. They operate just like
PC’s with voice communication software, nothing more. Just like with PC’s, you should be able to install the OS of your choosing without having to go through the hassle of having to ‘jailbreak’ or ‘root’ your phone.

Quite annoying, really.