BB Bold :: Spyware Detection And Reinstallation Of Software?

want to make sure my employer hasn't installed any spyware software on my device. From my reading, you can look for signs such as spikes in data transfers when you're not using the phone, that sorta thing. I'd like to be absolutely positive there is no spyware installed, and so what I'm thinking is that in a week or two, I'd like to do a re-installation of the blackberry OS system software. I'm on a mac, and my understanding is that I can take the phone in to an AT&T store and they could do the reinstallation for me. If I were to do that, would I also have to reinstall all of the apps I've downloaded? And short of this method, is there any proven spyware detection software I could use to avoid having to take these steps?