A Soft Reset (or Forced Restart) differs from a Hard Reset (or Factory Restore) in that it doesn’t delete any essential data from the smartphone or tablet but you may lose some RAM or temporary data, for example any unsaved game progress or the page you were viewing on a website.
A Hard Reset on the other hand would only be required when you want to wipe all data from the device, starting it over.
1. So, let's begin. Please press and hold Power button untill menu will show up (remember to this on unlocked device)
2. Next thing you have to do is pressing on Reboot option. It should look like something like this:
3. Now your phone should start rebooting, please wait a moment untill it finishes and you are done.