Set a goal
Have a reason for calling (ie. asking her out, talking about the project you have due next week, learning about her favorite food or hobby).
Call at a convenient time
Avoid calling during during times you know she’s busy. If you’re not sure, text her to ask if she’s available to chat at a certain time.
Relax
Take a deep breath if you’re nervous; she can’t see you, but try not to let your anxiety translate in your voice. Stand up straight and speak confidently from your diaphragm.
Ask questions
Ask about her hobbies, pets, favorite foods, and anything else that will allow you to know her better. Ask open-ended questions rather than yes or no questions (ie. Instead of “did you like the book?” ask “what was your favorite part of the book?”).
Listen
Actively listen to what she's saying. You can say “really” or “uh-huh” at pauses to show her that you’re listening (but don’t interrupt).
Be genuine
Don’t lead her to believe you’re into the same things if you’re not. Be honest about your hobbies and lifestyle and don’t lie to try to make her like you.
Cut to the chase
If your goal is to see her again, don’t draw out the conversation longer than it needs to be. Toward the end of the call, make plans to see or talk to her again. For example: “I’ll text you tomorrow” or “Let’s go out for ice cream?”