Hello,
The speed display relies on GPS data. If the GPS signal is not acquired properly, the device may display 0 km/h while driving.
Please note that even under optimal conditions, your device may take several minutes to acquire a signal.
There are various possibilities for GPS abnormalities. Please follow the checklist below to find a solution that suits you:
1. First, ensure that your device has GPS functionality.
2. Make sure your line of sight is not obstructed. If you are in an area with dense foliage, near tall buildings, or close to bodies of water, your device may take longer than usual to acquire a GPS signal. If possible, try moving to a more open area.
3. Some windshields are coated or have other heat-insulating materials that may interfere with GPS signals. Try moving the device outside the window to see if it can receive GPS signals.
4. Try power cycling (restarting) the device.
5. Try resetting your device to see if the issue persists.