Welcome to zSMS!
At least in Europe, the Short Message Service (SMS) is used extensively by users of mobile phones (especially those of the younger generation) - of course, this way you can say (or write) whatever you want, to whoever you want, whenever you want. There's just one litte problem: A limit of 140 bytes (160 or 70 characters), which is not really much. But what to do?
The funny thing is: SMS messages are mainly plain text; plain text reaches very high compression ratios. So, why don't we use compression for SMS'? Exactly that's the main goal of zSMS: Provide the users of cell phones and the SMS service with the ability of compressing their messages, to send more than 140 bytes with a single message!
This is done by a Java MIDlet, which runs on your phone, and which allows you to write, compress and send messages over using the SMS service; and, of course, which waits for incoming messages to decompress and display them.