You may need to restart your Android phone from time to time, for example if it’s going slowly or to install an app. To Reboot your Android phone hold the lock button in for up to 10 seconds. You will then be presented with a few options, one of which will be Restart Phone. Clicking this will then give you the following message:
Restarting your phone will clear temporary files out of memory.
Would you like to restart your phone now?
Click OK to reboot your Android phone.