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.
Calls typically cost between 5p and 12.5p per minute for landline customers. From a mobile phone, calls may cost between 25p and 41p per minute. Services provided on these numbers are regulated by *PhonepayPlus to provide additional protection for callers.You can fi nd out more information at www.phonepayplus.org.uk.alls from landlines are typically charged between 1p and 9p per minute and calls from mobiles between 5p and 31p per minute. For landlines there is normally also a call setup fee and call charges are dependent on the time of day.