As long as you have an unlimited data plan with your cell phone provider, you can download as many programs for your phone as you would like without an added cost to you as long as the programs / games are free. Some games you have to pay for and some are completely free. If you have a Blackberry Cell Phone, I would check out Blackberry App World (link below), or if you have an Iphone I would check out the App Store (link below). They are both great resources for finding games to either your Iphone or Blackberry Cell Phone and they also have a good number of free games on there.

Hope this helps.