If HTC was hoping to keep at least some of the One M9's details a secret, it's going to be sorely disappointed. Well-known tipster @Upleaks has posted three promo videos that reveal... well, just about everything. They confirm that the M9 will have a much higher-resolution 20-megapixel camera at the back, as well as an UltraPixel (likely 4MP) front cam for your low-light selfies. You'll also get Dolby surround sound from the One's signature BoomSound speakers. And that's just the hardware -- there's plenty on the software side, too.