Interestingly, on both phones the front camera can
switch between two modes: either a regular 16 - megapixel for when resolution is important, or an
UltraPixel mode which promises four - times the low - light sensitivity.
HTC moved from it
UltraPixel rear camera to a 20 megapixel single lens.The rear camera setup has
switched from a circular shape to a square shape, with sapphire glass protecting the lens.The camera lack the optical image stabilization (OIS) feature.