What does the (recorded) announcement, from the phone speaker, "Verizon Wireless" mean? I hear this announcement only when driving through one specific rural area. This area is about 700 feet up my home. My home is at 4200 feet elev. Also, (2) I hear this announcement in the same rural location which is about 10 miles from a cell phone tower. Prior to hearing this announcement I have NOT touched my phone.