Yesterday's lab installment gave us an opportunity to pit the Lumia 920 against competing smartphones in a low-light capture scenario, but Nokia's standard battery of tests is used to evaluate and improve far more than stills shooting. Several stops throughout the day brought us to a foam-filled sound chamber tasked with analyzing call quality in a variety of environments, a room with industrial freezers and ovens used to push the limits of operability, and a rig that can shoot with interchangeable sensors and apply image quality algorithm