You should call your family member when they ask.
Sam's dad texts him while he's in class, asking him to call when he's able to.
Sam wants to find out what his dad wants.
Sam finds a quiet place to call his dad after class is over.
Sam texts his dad rather than calling him.
Sam's father is relieved to hear from his son and tells him what's going on.
Sam's dad is frustrated that his son texts rather than calls.