I wasn't sure where to put this, but the customer service rep I talked to suggested I post my issue. I have a Verizon prepaid and noticed two calls on my account which I never made and was charged for. After explaining it to the rep, he credited my account for the calls but I'm still left wondering why this happened and if there is any way to prevent it from happening again. I was at work the day the calls were made, my phone was turned off and at home and I'm positive nobody had access to it because I live alone and always lock my house. The calls were both showing as outbound calls to the number 312-339-3700. I did a Google search on this number and it appears other Verizon prepaid customers have had the same issue with this number. Anyone know whats going on?