Any old navcore compatible with start 50

Hello,

A friend of mine has a Start 50 with navcore 15.401.
I've read that native navcore version is 13.057
My question is : would a 9.XXX navcore would work ?

2nd question :
My friend told me he has life map upgrades, if i enable radars (danger zones in France with actual navcore) on the device using fastActivate, would the lifetime upgrades could be lost ?

Regards.

He can only pay for new Radars.

tutorials-f80/important-note-for-new-tomtom-models-like-via-start20-go1xxx-please-read-t8690.html

Forget it. You can do nothing outside of MyDrive.
But most probably the GO 50 still has (older) Speed Cams on it.