Hello and welcome to LQ
Yes there is a simple way, by clearly telling us what you try to accomplish. See How to ask a question
A cdma modem isn't a very clear description (Never heard of this kind of modem before to be honest)
But if you, as example, try to connect your phone to your linux machine, please tell us the make and model and the type of cable you're using. And what you already tried. Like which command(s) you used to check if the modem was reconized.
So please give us some more information.