This is due to the GPS reception not being good enough to record a trip accurately. Your phone needs a clear line of sight of GPS satellites in the sky. Buildings and tunnels can get in the way. Also, the quality of GPS receivers varies by different models of phone. Therefore the recorded kilometres and/or recorded time in your trip feedback will normally be slightly lower than your actual mileage or time spent driving. On average, we’d expect to achieve successful monitoring of at least 80% of trips. Also, if your trip was very short in recorded distance or very short recorded time, it may also be disregarded.
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