Mobile phones are expensive  Mobile phones are expensive. First there is the cost of buying the phone. Then there are all the charges for using it. Often there are more charges for downloading apps and other extras. Sometimes we go over the limits of our call time or data allowance and are charged extra. Finally there may be extra costs when the phone needs to be replaced or upgraded. The average cell phone bill in the United States is $70 for a month but it can sometimes be much higher. Clearly not every child can afford their own mobile and often parents cant either.