When you first start your TomTom navigation device, the device may need a few minutes to determine your GPS position and show your current position on the map. In future, your position will be found much faster, usually within a few seconds.
To ensure good GPS reception, you should use your device outdoors and keep your device upright. Large objects such as tall buildings can sometimes interfere with reception. GPS reception can also be affected if the device is placed flat on a surface or held flat in your hand.