I'm in a long distance relationship and phonesex helps us know that we are still very much attracted to each other, but nothing beats IRL, and you may find that after you get back together again, phonesex doesn't cut it anymore.
You should be spontaneous about it, and be sure to have a vibrator handy. Don't stick to MMMM and aaahhhh, but instead describe each movement in the fantasy that you would be making, were he there.
After you get used to having phone"sex", you can even go for a phone blowjob, where, like IRL, he just sits there, listening, and you talk it out. When you do that, tell him to stroke himself the way you are describing your mouth on him (if you are telling him that it is just the tip of your tongue, he should just use the tip of his finger.)
Phonesex can last for hours, and result in multiples for both of you, especially with the help of a vibrator, it also makes getting back together a lot of fun.
BTW, hi all, nice to be able to finally contribute something
