I got a strange behavior now the 2nd time with 8.20.
Suddenly messages popping up every few minutes about an GPS firmware (chipset) upgrade executing and successfully completed.
It bothers and you could not be sure the device it workng properly.
The only thing that helps is a power-off. If you do it you first think you have bricked the 830.
Because you try to switch on and nothing happens.
But you see very dark in the background the power sign on the mostly dark screen.
It needs about 10 -15 min to power down.
After it boots up as normal and everything looks normal.
But it happened now the 2nd time I am interested in anybody experiencing the same, or maybe has an idea what this is about.