Something for everyone-Health blog

Once the mobile phone is powered on in a roaming market, customers become aware they are in a roaming state through the autonomous mobile registration process. When the mobile phone is powered on in a roaming service area, the phone registers with the system where it is currently located.Key elements of autonomous mobile registration process are the transmission of the mobile’s mobile identification number (MIN), otherwise known as the 10-digit telephone number; the electronic serial number (ESN) of the phone, which is essentially the phone’s fingerprint; and the System Identification (SID).The SID is a three or four digit number that uniquely identifies a mobile user as belonging to a specific home market. A roaming indicator will then appear on the liquid-crystal display (LCD) screen of the mobile phone, in the form of the letter R or the word “roam.”