Twice now I have been told that my cell phone has called someone without my knowledge. At first I assumed that I had bumped a button but I show no records of the outgoing calls in memory. I'm still waiting to see if the usage shows up on the bill. I have noticed from time to time that the display light comes on spontaneously while the phone is just sitting. I'm not sure what's happening here but it seems to be interesting. Both people could hear me and showed my number on their caller ID.