Soft resets are usually conducted in an attempt to fix malfunctioning applications or because they're required for software installation.
Soft reset contrasts with hard reset, which removes all user data, settings and applications and returns a device to the same state it was in when it shipped from the factory.
1. Soft reset is one of the easiest things you can do to boost your device, make sure you phone has unlocked screen and press and hold Power button.
2. Now there should appear a menu with few option like this:
3. Press on Reboot or Reset and your device will restart itself.
4. Wait patiently and you will be ready to work on your device after restart.