I have had this issue for several months. I can make outgoing calls with no issue. However, at times, when the phone rings (incoming call) and I go to answer it, there is no one on the line. At the same time, the caller hears the ring and then receives a message stating "This number is not in service" as I pick up the line. It is extremely frustrating! It does not always happen, so it is relatively manageable but extremely inconvenient to have to call people back when I cannot answer their calls. When this issue first occurred, I called Verizon support and I was on my cell phone with them for several hours (using my daytime minutes). However, since it is an intermittent problem, it was not possible to see if their "resolution" worked. Clearly it did not...HELP!!