You are stuck and the Link Essential installation is incomplete because you are getting the message, "Your phone is unable to communicate with the Link Essential." Make sure Bluetooth is enabled on your phone. If it is enabled, turn Bluetooth off and back on, then restart the installation process. Check that your phone is within Bluetooth range of your Link Essential. To do that, perform the installation with both devices close to each other. If the situation persists despite this change, contact Somfy customer service.