AT&T and Bell worked together to develop the North American Numbering Plan, or NANP, which states that all mobile phone numbers, whether cell phone numbers or landline numbers, must be composed of ten digits which are grouped into three parts. a) the code of the area (first three digits) b) of the office code (second …
Today, one the most popular means of communication is to use the cell phone. Really, this phone is one of the most important and greatest inventions of human beings, outside the course computer. Before, this gadget can do two things, the calling and text messaging. These two things are the key factors that every mobile …