Consists of 160 characters, an SMS is a text message that goes from one mobile to another. Gone are the days when an SMS was very expensive. Due to the ongoing competition between the mobile networks, the rate of an SMS has come down dramatically.
The latest technology has given many new dimensions to this service. For example, an SMS can even be sent from a website to the mobile phone. There are many websites that offer free SMS service. According to the approximate figures, there are nearly 3.6 billion active users of SMS.
Image Courtesy: textagirl.org
It is a simple form of communication that is possible only through internet. It means that both the sender and the receiver need to have an internet connection. There are several messengers that support this service, such as Yahoo Messenger, Windows Messenger and Google Talk.
Instant messaging actually offers a real time direct online chat. With two different people online at different destinations, they can chat instantly. Unlike SMS, the instant message reaches the receiver very quickly.
Image Courtesy: greenplanet.com