What should I do if my son goes to college and my parents don't answer the phone and text messages?

My son will go to college. Parents generally don't answer phones and text messages. It did happen, and so did my son when he was in college. Seldom calls his home. Should we call, or should we? Parents. Volunteer to call the guitar. Children may be in the world. Very long. I became an official with my classmates. Slowly I stopped thinking about my parents. But ... which means this kid. Not mature enough. If she is mature, she will gradually consider her parents' homesickness. I think. As a child. Being a mother at home will remind you of your parents' hard work. I will think of my parents slowly. Unload. They are still children.