missed call oddities?
From time to time I miss phone calls, and when I check the missed calls log on my cellphone, a couple of oddities pop up on occasion. One is a telephone number with a missing digit, making it an invalid number (and impossible to call back). The other is a number that when I call it back, I get a recording saying the number is disconnected. Depending on what I am doing, my callback attempt couls be anywhere from a few minutes to a few hours after the missed call. This has happened several times over the years with different phones, and service providers. It has even happened to friends recently. What I am wondering is what's causing this, and is there a way to fix or avoid it?