Yep, repeated calls to my cell, they leave no message, and when I call back the message says: "Thank you for calling Comcast. This call may be monitored or recorded for quality purposes. Please hold for next available agent. (brief pause) We are experiencing technical difficulties. Please try your call again." Of course, then they hang up.
I get a call from this number every night and with two 80 year old parents, a son in the military and a pregnant daughter I have to keep my phone on - so when I get this call late in the eveing, I have a tendancy to run to my phone.