Boasting the Android KitKat 4.4.2 operating system, a gigantic 5.1-inch screen, and a 16MP camera, the Samsung Galaxy S5 sets the standard for mobile phones. This Samsung phone offers 3G/4G LTE cellular service and wireless connectivity. Most importantly, the Android OS gives your Galaxy S5 full access to the Google app store and every digital accessory on your wish list. The Samsung Galaxy S5 SM-G900H is an unlocked version of the Samsung Galaxy phone. You can use it with any GSM carrier such as AT&T and T-Mobile. First launched in April 2014, the Galaxy S5 smartphone created buzz for its toughness. The Galaxy achieves military-spec IP67 water- and dust-resistance certification. Dust jackets cover all charging, camera, and inlet ports. A rubber gasket seals the back cover. The touchscreen of the Samsung Galaxy S5 is manufactured from heavy-duty Corning Gorilla Glass 3. Most importantly, this Samsung Galaxy smartphone can remain submerged three feet underwater for 30 minutes.