My phone says "No Lan", "No Internet", or "No Service" and isn't working, what do I do?

This error messages occur when the device loses its connection to the internet.  Please check that your ethernet cable has not come unplugged (at the phone and the router side).  For WiFi connections, make sure you are receiving a signal from the propper SSID.  If the cable is secure and your WiFi SSID is showing up, the issue is likely due to an internet outage or temporary outage.  Reboot your router and attempt to reconnect, or contact your internet service provider to troubleshoot.