I find that of late the Samsung default phone app hangs and refuses to close once the call is over, I can't close the app, or go back to Home till some time, after sometime I get the message on the screen " App not responding, with option to kill or ...

I find that the M30 mobile does not charge when connected to the charger that was issued , I have used different cables, different chargers, shut down, restart, even factory re-settings ! However it charges only when connected to the PC's USB port us...