If you want happy children, you should give them a cell phone as late as possible, advises an expert. According to the “German Society for Child and Adolescent Medicine e.
V. (DGKJ)”, primary school children should not spend more than 30 to 45 minutes per day in front of their smartphone or tablet. The later children use their own mobile phone - at the earliest at the age of 13 it would make sense, says Dr. Laurie Santos.