Hi all. Read this, if the app does not Show any GPS values. Important: - As soon as the Gear S3 is connected via Bluetooth to a Smartphone, the Gear S3 will use the GPS Signal of the Smartphone. This is an internal Logik from Samsung and cannot be changed. - So: If you have a Bluetooth Connection between your watch and your Smartphone, BUT GPS is turned OFF on your Smartphone, the Gear S3 will NOT use it's internal GPS, but the App will get empty data and thus show a black screen. If you want to use the internal GPS, be sure to activate GPS/Location on the watch (Settings, Connection, Location) AND to disconnect the Bluetooth-Connection to your Smartphone!