The Casio G'zOne Commando 4G LTE (pronounced "jeez-one") was designed for someone with an active and outdoorsy lifestyle. It's water- and dustproof, can survive extreme temperatures, and is shock resistant. It's currently available for $99.99 on-contract from Verizon.
A vertical toggle lock secures the battery door. To remove the plate, switch the lock upward. Then, using an indentation to the right, pry off the plate with your finger. The battery inside is also locked down.
Both the 8-megapixel camera (pictured here) and the 1.3-megapixel camera in the front have digital zoom, an exposure meter, geotagging, a timer, six white balances, four color effects, two qualities, image stabilization, touch shutter, and grid lines.