GUI

Phone setup: connect it to the computer using a cable or IrDA or whatever works. Switch the transmission on in the phone, if necessary. If using a cable, select "Automatic speed" in the configuration.
The default parameters in JYMAG should be working in most cases. If needed, you can set the port parameters manually.

No need to connect to the phone. Start by selecting the tab you're interested in (photos, ringtones, ...).
Click on "Get list" to connect to the phone and get the list of elements.
Select the elements you wish to download and click "Download selected". Choose the destination directory. The downloaded files will show up in the selected location.
To upload an element, simply click the "Upload" button. Getting the list isn't necessary. You can also drag&drop the files you want to upload on any of the tables (except the alarms and SMS messages).
To edit an alarm, double-click the cell in the table. Keep the format unchanged.
To read an SMS message, select it in the table and choose "Download selected". A new window will appear allowing you to read the message.
To send an SMS message, click the "Upload" button. A new window will appear allowing you to type the phone number and the message body.