The content of the phone bill is calculated that the contents of the phone bills each month include: telephone bill rental fee, local network call fee, long-distance call fee, information fee, data business fees, etc. Among them: The monthly rent is this month. Other expenses other than the monthly rental fee is the cost of the last month - the cost of the 20th this month. Such as: in December, the monthly rent is December; Other costs occur during November 21 - December 20th.
