Please try the following:

1. Reset your modem. On the back of the modem where the cables are located, there is a small hole labeled "Reset". Insert an unfolded paperclip (or toothpick or something similar in size) for 2-3 seconds. Wait 1-2 minutes. Retest your phone service.
2. Connect one telephone handset directly into the Telephone 1 port on the back of the modem. You will need to disconnect the telephone cord already connected to that port to try this. Check to see if the issue is resolved.

 
If the issue is not resolved, please use an alternate phone line (cell phone, neighbor's phone, etc) to contact Customer Support at 1-866-496-9669. Representatives are available 24 hours a day, 7 days a week.

Yes. To remove Voicemail, please contact Customer Support at 1-866-496-9669. Representatives are available 24 hours a day, 7 days a week.

You can find the Phone User Guide by clicking here.

The government has a website that you can use to sign up for the Do Not Call list. You can find that here: https://www.donotcall.gov/