Mine lasted just over 4 years before having to change it as there's no custom roms for it and many apps can't install/update on Android 4.3. Just sold it for $105 CDN. A really good device, just stuck forever on Android 4.3, so sad really.
I've had this phone for 18+ months and it takes tons of abuse without a cover. The case is all scratched up from dropping it onto concrete at 15 mph TWICE but the screen is fine and it still works. I wash it in the sink under running water too.
I traded in my free LG K7 for this phone. It obviously did NOT have gorilla glass because when dropped, I caught it with my foot and when it barely touched the ground, the screen cracked. I was leery about the Kyocera since I they are a newer compa...