this morning I've realized that the navigation keys are not working any more on my Nokia 6. Restart does not provide any effect, Do I have any alternative to the classic repair process? At least this is happening suddenly, with no accident (i.e. no telephone drop or other type of crash)
Make a backup of Google. Then reset the factory settings.
Thanks for the suggestion. In that case I tried but unfortunately this seems not to be working :(
I fear I have to ask an in warranty repair
an important update. The day after the Navigation keys were back in operation again. Now I'm re-configuring the phone, no need for warranty support, but it would be interesting to learn what did cause this outage on the navigation keys. It's boring that, in order to select a new application, you've to restart every time your phone ;-)