Android KitKat is the most popular Android version around right now, running on roughly 40 percent of devices. But it has its problems. We've had more experience with many of these Android KitKat issues than anyone really deserves, but we learned some valuable lessons in the process. So we've compiled this list of the most common KitKat problems and how to fix them. Join us, friends, for a walk down Android KitKat troubleshooting lane.