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 other fi xed networks typically cost up to 10p per minute. From some mobile networks calls typically cost between 20p and 40p per minute. Recently some other providers have also included calls to 0845 and 0870 numbers in call packages, making them free at certain times of the day.