Merit and defect of mobile phone/PHS

Merit: First, the area we can use it must be wide.
It probably is by the 2nd streetcar and the automobile to be able to utilize even during high-speed moving. Because sound does not come out different from telephone call being there are no either times when annoyance is put on others, by the Shinkansen and the automobile, you must send the data while moving by any means, it is, kind of when, it is convenient not to be wrong.
Defect: When data communication is done 1st, the 9600bps (*) with being to be slow even with most speed, other than the email it does not have to be practical. Furthermore this speed is when it is favored to good condition, while moving when radio wave becomes weak with influence of the building and topography, communication quality there is no astonishment and decreases and, having stopped and there are times when base station changes, this produces effect on communication quality. When communication quality is bad, the several of mails there are also times when several minutes it spends to removing.

	Mobile phone	PHS
Merit	+ Radio wave being strong, it is easy to be connected.(it it not cut off)	+ We can do data communication with the 32kbps. + Telephone call charge is cheaper than the portable telephone. + We can use even at the underground. + Sound is clean.
Defect	+ We can do data communication with only the 9600bps-the 14400bps. + The sound quality is bad.