If you’re okay in the sack, then just try to verbalize what that’s like, but go slow — frustratingly slow. Unless they’re already very aroused, women fantasize differently then men do, so you need to create the scene and tell the story. Good phone sex needs to have all the components you’d have in real life: seduction, foreplay, and a good satisfying fuck, along with steady heapings of affection and respect.
Start by being very romantic. Let her know you’re thinking about her. Tell her how gorgeous she is and how much you miss her. Then talk about what you miss. Her smile, her lips. Kissing the side of her neck. Don’t go too fast. Go through all the stages you would if you were with her. Talk about kissing her, then touching her breasts, then how perfect her pussy is, and what an incredible lover she is.
If you go too fast she might say that you only like her for sex. Let her know you like the whole package. You might make her cum over the phone, and she might make you cum too, but your goal is to make her want you and yearn for the next chance to be with you. It’s fun. I love the challenge of getting a woman off using just my voice and imagination.