A soft reset (turning the device off then back on) is similar to restarting a desktop computer and is one of the first steps in troubleshooting a device. In most cases, a soft reset won't affect data on the device, unless the battery is very low.
Press and hold the Power button (located on the right edge of the device; above the volume keys) until the options menu appears then release.
Select Power off.
From the "Your phone will shut down" prompt, select OK to confirm.
Allow several seconds for the device to power off.
Press and hold the Power button until the Motorola logo appears then release.
Allow several seconds for the device to power on.
There is an alternate reset process if the device is frozen/unresponsive.