When my nephew is at my house, he likes to mess around with my HTC Desire. He usually plays games on my phone. Recently, he's been going into places in my phone that I don't want him to go in. My email, my contacts, and other files. Once, he even sent out a massive test to random people on my contact list. So, I banned him from playing with my phone until I find an app that blocks guest users from going through parts of my phone that I don't want them too. Any suggestions? Thanks.