It requires Internet to update maps, install corrections, or additional features. It requires the GPS signals transmitted by the satellites to know where it is and where to go.
If you do not want to update the device you need just the GPS signals. However those satellites may be moving about and theirs positions have to be reported to the device otherwise it will take it longer to lock in on the signals, and might even never find the satellites.
SOURCE: Tomtom not finding gps satellites
i had exactly the same problem, i dont really know how i solved it but first i thought it could be a memory problem slowing the gps signel so i reset the tom tom to factory settings then downloaded the updates from the tom tom home program of corce i lost all my destinations but i didnt want to do a back up just incase one of the updates had a virus or something so if u want to keep them i sugest u write them down first.and then i got a safty pin and pressed the reset button underneath where the memory card goes twice the second time i held it down for about 10 seconds then i looked for updates again from tom tom home. after that in tom tom home there is an option where u can operate your tom tom on your pc so i tryed that and i put in a destination on the pc and clicked on demo tour so i watched the route first it was a bit slow but started to speed up a little. after it had finished i un plugged the sat nav and went for a walk with it around the house soon as i went out side and set a destination it found 6 gps signels,make sure yhe battery is charged to at least half. well i hope anyone who follows my steps gets the same results, thought i lost 200 quid cos i have had it over two years and its only guarenteed for 12 months. well good luck.
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