Two new photos of the alleged iPhone 6 rear shell have been posted on Twitter by Sonny Dickson. The photos of a scuffed-up shell show the round True Tone flash, and it appears that the ring around the camera is protruding. Antenna breaks are still somewhat of a mystery — it’s possible that these are unfinished shells, with antenna breaks to be filled later with another material — but it’s also possible that Apple will be using plastic…