The SMS (short message service) allows sending text messages from one cell phone to another cell phone or from the Web to another cell phone.

How to send free sms from your computer to any mobile device and any operator or network around the world ?

Using Free SMS Gateway service via the web, that makes it possible to send and receive SMS messages from a computer to mobile phones used in GSM digital cellular telephone networks.

GSM Modem attached to the computer with a phone-to-pc data cable or it can use an IP SMS Gateway connection to send the messages directly to the SMS Service Center of the GSM Service provider,

With the application programming interfaces (eAPI's) enables multiple users to send and receive bulk sms messages and online sms simultaneously using the Internet.