Here is a diving housing for your smartphone that lets you capture videos and photos under water with peace of mind. The SeaLife SportDiver Diving Case for iPhone and Android is rated to 130feet. It has a polycarbonate, stainless steel, aluminum, and optical grade glass construction. It weighs only 1.5lbs.
The SportDiver ships with a removable color correction filter. It has triple 1/4-20 tripod mounts, large shutter lever, and rear control buttons, so you can operate your phone under water easily.