JOCA is a freeware mobile phone

Mobile phone

A mobile phone is a device which can make and receive telephone calls over a radio link whilst moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile network operator...

 application based on Java ME

Java Platform, Micro Edition

Java Platform, Micro Edition, or Java ME, is a Java platform designed for embedded systems . Target devices range from industrial controls to mobile phones and set-top boxes...

. Certain content is being preprocessed/compressed by a proxy server system and exchanged via GPRS (UMTS not being required) with the mobile application. JOCA features an online Wikipedia browser (English and German), a programmable RSS reader, a television EPG, radio playlists, weather forecasts, traffic information, horoscopes as well as commercial content (e. g. mobile lottery

Lottery

A lottery is a form of gambling which involves the drawing of lots for a prize.Lottery is outlawed by some governments, while others endorse it to the extent of organizing a national or state lottery. It is common to find some degree of regulation of lottery by governments...

, music sales etc.).

JOCA is being developed and enhanced by InteracT!V and on air since early 2005.