Check it periodically from time to time (while she's busy or whatever) for the dialed/received numbers. If she deletes all her history, chances are she's hiding something or cheating on you. Don't even bother to ask because she will LIE about it and get all huffy and go off into the "you don't trust me" rant.
Also, if she locks her phone where you can't access it, that's a definite red flag.
Just a heads up.
Also, if she locks her phone where you can't access it, that's a definite red flag.
Just a heads up.