Your phone may have a USB connector and manager software.
- Run the manager program.
- Copy the .jar file to a folder in the phone.
Note: The manager software provided with some phone models (eg.LG model U8360)
may not install JavaTM programs to the phone. You will need a Java uploader, for example
Game-Thing offers a fantastic Java uploader that
also does many of the ' vanilla ' manager tasks (like transferring photos) much better than some phone software.