Actually the Droid RAZR will support the SIMS, if you stop all unnecessary running apps and services, and uninstall all unnecessary apps. Since it takes a very large portion of ram, as 94lt1 said, only the newest phones with large memory can support it. Make sure you uninstall the Madden Football, the racing game, Golf and the other large applications that can be uninstalled, as well as any large apps you have downloaded. If any of the apps you have can be moved to the external SD card (microsd-ext), do so. This will free up even more ram.
Eventually you will get to where you need to be in order to play the game.
Good luck.