Using a mobile is expensive as their behaviour reflected object because it is not necessary to sustain life. Cheap mobile, it can be used from a mobile is expensive.
The phone is expensive, the behavior of the material because it is not necessary to sustain life. Mobile phones are cheap, I can use it as the kind of cell is expensive.
Handheld expensive is the behavior of materialistic because it is unnecessary to lives. A cell with a cheap, it can be used as mobile phones are expensive.