The mandible is a U-shaped bone. It is the only mobile bone of the facial skeleton, and, since it houses the lower teeth, its motion is essential for mastication. It is formed by intramembranous ossification. The mandible is composed of 2 hemimandibles joined at the midline by a vertical symphysis.
1 For example, AT&T charges $23 for a home residential line that includes a few additional basic features such as caller ID, call waiting and voicemail. 2  Home phone service plans that include local and long-distance calling cost $30-$45 per month.
Pay by phone: You can pay your AT&T bill by phone by calling 1-800-331-0500 or 611. There may be a processing fee for paying your bill by phone. To make a payment without a fee dial *729 from your mobile phone. At the prompt, press the number 1 on your phone to pay with a bank account or 2 to pay by credit card. Enter payment information and wait for the confirmation number.