There seems to be more 'issues' when it comes to the mogul and BT. Not sure what it is, but you can't use it with Nissan Navigation units. The people on the other end can't hear you, and when they speak all you hear is choppy distortion.
I did some researching after the fact, and found a whole thread on the problem and everyone is having the same problem. HTC says you need to contact Sprint, Sprint says there is nothing wrong, and Nissan says the Mogul will never work their system.
Here is a thread on the issue
http://forum.xda-developers.com/showthread.php?t=353632
That's why I'm a little hesitant on spending 1k on the Eclipse unit, and BT adapter. I don't want to find out after the fact that it won't work
