MisfitDevil99,
My best recommendation is to allow her little unsupervised time alone... for a period of time when my older child was a teen and still in the house, we even had an open door policy - the door to the bedrooms were supposed to be open except when changing clothes, etc. (and computer screen turned so it could be seen from doorway).
A service which provides what you describe above is My Mobile Watchdog (
http://www.mymobilewatchdog.com/). However, I will caution you that if she finds it, further damage to your relationship is likely.
Also, it seems you've asked a couple of other cell phone related questions - have you been straight with us in all of these questions?
Cheers,
LHerrou