Noting this recent advice from TomTom..
"What is the GPS Week Number Rollover? (ex [Please Register or Login to download file] on 03APR19)
The GPS Week Number Rollover (WNRO) occurs every 19 years, with the next roll over taking place on [Saturday] 6 April 2019. Similar to odometers in older cars rolling over from 99,999 km to 0, the GPS WNRO is the resetting of the GPS calendar back to 0.
When the calendar resets, it can cause a miscommunication between GPS satellites and GPS receiver chips. As a result, some chips in satnavs will lose the ability to process certain functions.
What does this mean for you? It’s time to check your satnav. Depending on your device, you may need to update or upgrade."
As I understand it that means my TomTom (GO 920) will not show the correct current time or ETA information.
TTHome tells me that I need to update/upgrade to NC 9.541 (from its current 9.510).
Has anybody any advice on how to retain the auto-start (power-on) feature, that I really value and use daily in 9.510, and avoid any time display problems?
Also, perhaps more significantly, it seems all previous NCs will no longer be able to show the correct current, arrival and journey times, unless they are modified in some way. Any solutions?
[PS I'm posting this query in other forums for a great audience and thus hopefully ellcit a helpful reply}