Do you have to be an established manufacturer to make a great smartphone? That movement got a big boost this week from OnePlus with the reveal of its first smartphone, the One. The One — not to be confused with HTCs smartphone line of the same name — appears to be a surprisingly capable smartphone for $299. Its not an overly large or heavy smartphone for its size either, though thats assuming that youre OK with a big 5.5-inch display in the first place.