S60 APAC freezes when saving activities / GPS not working

Hi,

my S60 is making trouble:

When using skiing, walk, run or bike, the watch will not start GPS for the activity (even if I stay same location for half hour).

If I stop the activity and try to save, the watch freezes while showing the "saving screen". The freeze cannot be stopped by pressing any combination of buttons and the battery is quickly depleted.

The freeze can only be unlocked, when connecting to a charger.

Switching off and restart does not help.

Does anyone have an idea how to fix this?

Cheers