A method for operating a monitoring unit (100), configured to monitor a manipulation of at least one object (40, 45) by a user, the method comprising: receiving, via a cellular network (60), actual user position data comprising an actual position of at least one portion of user used to manipulate the at least one object, and actual object position data comprising an actual position of the at least one object, matching the actual user position data to predefined user position data provided at the monitoring unit (100), the predefined user position data indicating a correct position of the at least one portion of the user for manipulating the at least one object, and matching the actual object position data to predefined object position data provided at the monitoring unit, the predefined object position data indicating a correct position of the at least one object, determining, based on the matching, whether the manipulation of the at least one object by the at least one portion of the user is correct or not.