Your navigation device uses the signals of at least 4 satellites to get a GPS fix and determine your starting location. This can take longer when the GPS signal is weak or partially blocked.
When using QuickGPSfix, a feature only available to TomTom customers, your navigation device retains information about where the GPS satellites will be for the next 7 days. Your navigation device can then calculate where you are very quickly and with only a weak GPS signal.
If your navigation device is unable to receive a GPS signal, see No GPS signal on your navigation device? Here's what to do
The process of updating QuickGPSfix depends on the type of navigation device you have. When a new QuickGPSfix file is available you will see it in your list of updates. For more information, see: Updating your navigation device
Note : If you have a connected device that receives TomTom Services through your Smartphone or a built-in SIM card, you receive automatic updates for QuickGPSfix as soon as they are available. For Smartphone Connected devices you need to connect to a compatible Smartphone in order to receive updates.