Any way to downgrade my iOS7 iPhone 4 back to iOS6?

Any way to downgrade my iOS7 iPhone 4 back to iOS6?

There's a possibilty to do this through a jailbreak. It means you have to jailbreak (google that) your iPhone, and then find the app to downgrade your iOS.
So it's possible.

I don't believe there's way to downgrade

Downgrading isn't supported by Apple so if it is possible it isn't smart to do.

Nope.