Population and sample the study is using a mobile phone, two categories (prepaid and postpaid), a mobile phone provider (AIS, Dtac and TrueMove) in Bangkok and Thailand's six regions.
The sample population and is the second type of mobile phone users (prepaid and postpaid), a major cell phone service providers (AIS, Dtac and TrueMove) in Bangkok and six regions of Thailand.
Population and sample of study, is a mobile phone user, the 2 types (prepaid and postpaid) which is the major mobile phone service provider AIS Dtac TrueMove (, and) in Bangkok, and 6 Thailand regions.