The Short Message Service (SMS) has proved to be a very popular messaging service, supported by most GSM, TDMA and CDMA mobile networks.

In its most simple form (Standard SMS), an SMS is a text message of up to 160 characters.

Besides Standard SMS, several other features like Unicode SMS and Long SMS are available. These extra features are also explained below.

• Standard SMS
• Unicode SMS
• Long SMS
• Flash SMS
• Group SMS
• Caller ID
• Delivery Report
• GSM 7-bit alphabet
• Email2SMS