It seems that many people avoid the use of whispering in their dirty sex conversations, and most of the time it is for a good reason. Talking on the phone on free mobile chat line numbers can be hard enough to understand normal talking volumes, and whispering can make hearing what is said accurately even harder. It is, however, a compelling word and one that can still be incorporated into your phone sex chats. If you are calling a kink related adult chat site, you can actually use the person's inability to hear you for your advantage. Some people even choose to not fully say the words to increase the likelihood that the submissive role player in the conversation will not be able to follow a command properly, leading to additional kinky playful punishment.
 
That said, if you start phone sex talk at a little bit above normal voice volume, and let your phonesex chat friend know that you are leaning in to whisper in their ear before moving to a slightly lower than average voice volume (but still understandable) you can still get the effects of that whisper. People are not only listening to your actual volume, but they are listening to what you are saying and putting themselves in the position of the person receiving or hearing the action. Whispering is a diverse word to use in adult private chat not only for its power exchange uses but also for expressing affection and pleasure. After sliding your pussy over his cock to ride in cowgirl position, you can bite the top of his shoulder and slowly move your lips close to his ears and whisper “your cock feels so good inside of me right now” before letting out a subtle moan as you touch yourself. Adding a pause before saying what you want can also add additional suspense, and either person in the kinky phonesex chat can do it.