GSM:Global System of Mobile communication
GSM: It stands for G lobal S ystem of M obile communication . It is the type of network in which data is transmit in four different frequencies. Present GSM is Working on 2.7 GSM. Mobile: It is the wireless device which is used to transmit the data (Voice, Text message, Multimedia message, E-mail etc.) from one mobile to another mobile. Data transmit : The mobile is connect with nearest base station (Tower), all the data firstly transmit to base station then the satellite and at the end it reaches at other mobile .