Disconnecting the battery is unavoidable since the phone is sometimes completely freezing with black screen during a call and I cannot stop it in any other way but by disconnecting the battery. This might happen even once in 3 to 5 days. Besides that horrible locking, setting again the date and time is quite unpleasant.
As experiment I have removed the sim, powwered off the phone and the date and time stayed correct even after several days.
Anybody else having the same problem with clock and date while removing the battery?
Any solution somebody can share with me, please?