Eh, I hate it. My career has always involved immense amounts of phone time and I've even had times in life where I had an anxiety type phobia response to a ringing phone, no kidding. I'm often on the phone when posting to this forum... don't tell my clients. My cellphone ringer is off 90% of the time. OTOH, if there is any aspect of my sex life that is true genius it is my phone work. I have had some truly amazing things happen after one or two phone calls from an OLD site or regular meeting, things that people wouldn't believe, over 30 years. So it's a weakness and strength at the same time, love hate.
So, what I have learned:
1. If you are good on the phone use it to close and use it generally. "Good on the phone" means "can you come over? Don't leave me hanging" after a couple of calls, or they start sending naked pics without you asking or wanting to do phone sex. If you are a "chatter" or "20 question player" on the phone, you aren't good on the phone. If you aren't good on the phone, use it only to make facetime plans. The way I have learned this is by listening to friends talk to women on the phone compared to me talking to women on the phone. Play to your strengths, if you don't make women wet on the phone, do other things and avoid phone/text.
2. When they say "want to hear your voice" it means they are struggling with limerence. Everyone on the forum should read the wiki page on limerence. DON'T LET THEM USE CONTACT WITH YOU TO REDUCE LIMERENCE, especially once you are sleeping with them. In rational man mind, you think you are doing good, giving her what she wants, getting her to feel more and more strongly about you. NO, you are killing attraction, killing it DEAD. IMO, every single contact that is not face to face with a woman you are sleeping with call, text, IM whatever, kills sexual response when you get together.
3. So, you have to talk to them some or they won't continue fing you, how do you do it? Be PROACTIVE. "I got five minutes break, and they are all for you." Give them plenty of five minute intervals to avoid 1 hour bleh. If you do this right, you only have to talk 5-10 minutes every other day or so to women you are sleeping with, and you can avoid the dreaded "goodnight" and "good morning" regimen, you can avoid the routine which is attraction killing andtime wasting. Call them first and avoid the long chatty BS.
Hope this helps.