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.
AUS (Toll Free) 1-800-360-519. AT&T Customer Support Number. ATT Inc. is an American multinational telecommunications located in Whitacre Tower, downtown Dallas, Texas. It is the major provider both of mobile telephony and of fixed telephony in the USA, and also provides television services, broadband subscription.