Is the Samsung Gravity 2 compatible with games or applications?

I have a Samsung Gravity 2 and I would like to get some games and applications on it. It came preloaded with 2 demo games so I assumed it would be compatible. T-Mobile says it is not compatible when I went to purchase some. Other websites say it is. I would REALLY appreciate it if someone could shed some light on this situation for me.|||I have a Samsung Gravity 2 as well and I have tried putting games on that are jar files and it says unsupported file format. I recently unlocked my phone and it still says that it is unsupported. My guess is that nothing else works besides the demo games that are preloaded on the phone.