I have an AT&T 933 speaker phone which signals "Power Failure" even with a new battery and when plugged into known active power outlet. I actually have two of these phones and the results are the same on both. After an hour of telephone calls to AT&T today I was advised that since I have Comcast not AT&T for my phone service, they will not respond to my complaints. Their web sites essentually say the same, as you can't lodge ...