First, reboot your phone by turning it off and then back on again. Doing this can help when your phone is running slow. You can also clear any apps that are open. Press the Window button at the bottom of your device. This will show you any apps that are currently open. Swipe away or clear the apps that you aren’t using or select “clear all” to clear all of them. Sometimes an app is running in the background, but doesn’t show as open. You can go to Settings, and then Applications (or Apps) to check for any unused or unneeded apps you want to clear. If one of the apps is not running correctly, close or reboot that app.