For each of the slides, you see two pictures of the same category (Night, Wide Angle, Macro Shot, etc). Each pair consists of a photo taken by each of the phones being tested. The phone which took the particular picture is not labelled. After viewing each slide, you choose which of the two pictures you prefer. As you make your selections, we tally the votes for each picture within every pair. The phone that receives the most votes is considered the preferred choice for you.