One of the problems with playing many Java games on a Nokia S60 phone is that they often only take up a partial area of the screen on high resolution displays. The likelihood is that if you're trying to play some of the older games on a new phone, you'll run into problems when viewing them. Change Resolution is designed to put a stop to these problems, allowing you to adjust the display of mobile Java applications to fit the most common screen resolutions.
The software makes it pretty easy to configure these display settings over the course of two pull-down menus. The freeware supports all the recent Nokia mobile phones using source and target sizes 176×208 (Basic), 240×320 (QVGA) and 352×416 (Double).
If you're frustrated by Java games not displaying properly on your phone then Change Resoltion s60v3 provides a very simple and effective workaround.