I have my phone service contected to my account and as of 5 pm pacific time I do not have a dial tone and can't call the 800 #. I have disconnected all phones and plugged only a direct dial, no cordless phone, and plugged it into several plugs in my home. Even reset my modem several times and still no dial tone. It is a mystery to me as to what is going on, how do I resolve this issue quickly?? I need my phone to work.
Contact them at the phone number on your bill or 1-800-Comcast, or chat with them at https://www.comcastsupport.com/chatentry/. If they can't fix the problem remotely insist that they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have or sign up for their Service Protection Plan (https://www.xfinity.com/support/account/service-protection-plan/, about $6/mo) and keep it for at least 60 days. If the trouble is due to a faulty Comcast phone modem or anything outside your home, you shouldn't be charged.
Comcast may or may not respond to your message here. If they do respond, it may take them several days.