Re 1.
Contacts are no longer stored on SIM cards.
Re 2.
In WhatsApp, I have the option to save the contact to my device or manage it directly through WhatsApp.
With option 1, the entries appear in my phone’s contacts.
With option 2, they do not appear in my phone’s contacts.
The solution would be that I wouldn’t have to import a contact received via WhatsApp with the press of a button, but instead should add it manually to my contacts.
I can’t imagine that no one else has noticed this while using WhatsApp. How have others solved this problem?