http://au.support.tomtom.com/app/ans...aTd5aipKMmw%3D

Mandatory software update to restore GPS signal


A mandatory software update is available for some TomTom models. Please install this software so your TomTom device will operate as expected.
Customers with the devices below should follow these 4 steps:

Via 220, Via 160/180, Via 260/280, GO LIVE 820/825, GO 1000, GO 1050/1050 World and GO LIVE 1000/1050/2050/2050 World.