I'm gonna use a computer analogy that might be relevant to this discussion. Sometime around 1991, I bought my first computer. Over the following years, I started upgrading it by buying "better" and "faster" parts, replacing the original parts. Of course, I ran into some compatibility issues along the way, and consequently within five years, there was nothing left of the original computer, every single part had been upgraded. It was now a completely different computer.
My point being that yes, it is possible to turn a 3G into anything you want, but can you rightly claim it to still be a 3G in its final form???
My point being that yes, it is possible to turn a 3G into anything you want, but can you rightly claim it to still be a 3G in its final form???