In 2014, OnePlus arrived out of nowhere with a powerful idea: What if a phone could look good, be powerful, and not cost a crapload? The OnePlus One was a mic drop and the OnePlus 2 a successful sophomore follow-up, but the new 3 silences the haters -- the OnePlus 3 is a "Flagship Killer" and at $US399 ($550), with no more dumb invite system, it's not just the best OnePlus phone ever, but one of the best cheap phones too.