[digi]

If you want to read their incoming messages totally undetected, you could just take any extra phone, or even your own phone temporarily, and program it with their MDN, then all incoming messages will got to their phone, and your phone, they will have no idea.

As far as outgoing text, I say install the older dashwire program (the old one never pops up on its own) and rename the exe so it doesnt show in task manager. But ofcourse dashwire would only work on the mogul.