The screen showing a rocket or a green arrow on the watch indicates a software or firmware installation, while the "update" screen refers to the installation of a resource package. Both screens may stay on the watch for three reasons: 1. During the update process, if the watch's battery drops below the required level (40%), the update will stop. 2. If your phone's screen turns off or you exit the app during the update, the process will stop as it relies on the app running in the foreground. 3. If the watch and phone are separated significantly, the update will stop, as it depends on the connection between both devices. If this happens, make sure the watch is charged, open the app, and if the watch is connected, it will prompt you to update. If the update doesn't start or you get a pairing error message, remove the watch from the app and Bluetooth settings on the phone attempting the update, and try on another phone.