What is SMS?
SMS stands for Short Message Service. There are two types of sms messages. One type is called text messaging and is like a paging service that lets you both send and receive text messages right on your mobile phone. The text can be made up of numbers, letters or a combination of both up to 160 characters. You can even receive text messages while making a call. The other type of sms messages are used to send special instructions to your mobile phone like changing the ringtone. Unlike text sms messages, this special group of SMS messages cannot usually be displayed by your mobile phone. The GSM network uses these special SMS messages to communicate to your mobile phone, so it knows for example when your phone is on, which mobile cell you are currently in, or what frequency your phone is operating on.
SMS or Short Message Service, (also known as short messaging service, text messaging, mobile messaging, or alphanumeric paging, celltext, texting, phone messaging) enables you to send brief text/numeric messages to and from digital cellular telephones. Messages can originate from cell phones as well as e-mail addresses and public SMS gateways on the Internet.
