Yes, that's okay. In a modern telephone, it is not necessary to dial the number every time, you can repeat the call or select from the list "dad", "mom", "grandmother".
Probably, "Employees of a European public organization not discovered "this function, or did not read the instructions for the phone, but mastered the grant.
Is it normal that "employees discovered" or that "children don't know"?
In the TV show Field of Miracles, annoying for some Russians, young children are often shown who cannot even say the names of their parents. Why don't they know? Because they do not address by name, they do not need it. For them there is dad and mom.
As for ignorance of phone numbers, when calling it, a person dials not a number, but a contact. It was in the days of rotary dial phones that people knew many numbers by heart, because they often used them.
For example, I do not know my son's phone number, but he does not know mine. What for? To call every five years from someone else's smartphone on occasion?