my son is 13 and has a smartphone. although I trust him its other people I don't. There was an incident in the family where my young nephew was kidnapped. thankfully his ok but since then I have been really paranoid.
I came across a software that can be downloaded on my sons phone. I can then log in my account and view everything that's on the mobile. I brought it mainly so I can track his location and monitor his facebook etc. although I have the option of listening to his calls I don't but I still feel guilty about spying on him.