This is why!!!!!

[Selltech]

This is why i dont let others borrow my phone. Heres the background. One of my "friends" is an IT guy at a major corp and I let him use my phone for the net cuz he had no recep. So any way this guy is kind of psyco and a little while a go he told me that he can get on his work computer via the net and use files and bla bla bla. I zoned. Anyway after I let him use my phone I noticed that now the little arrows by my signal go crazy at times for no reason and sometimes its really slugish. I was wondering, being that my phone is connected to the net via phone lines could he have done something to connect to my phone when ever he wants to???? The last thing I want is someone in my personal files (passwords pics etc..). If so how can I stop this if it's happining to me? AND THIS IS WHY I DONT BORROW OUT MY PHONE! Help please. Maybe Im nutts but better safe than sorry.