If you also want to use your smartphone when skiing or mountain biking or when you're at work at the construction site, you should opt for the sturdy Crosscall Core X3. The smartphone is waterproof and the screen is specifically designed to function properly when it's wet. Thanks to the sturdy casing, the Core X3 is resistant to any damage caused by drops, and scratches won't stand a chance either. Are you going hiking for a couple of days, far from sockets and the rest of civilization? The large battery of the Crosscall Core X3 means you can use your telephone for a couple of days without having to recharge it, even if you're regularly using GPS.