Q: i bought phone 5 its disabled what can i do

Well, you do not indicate what is disabled, or what you may see on the screen, or what troubleshooting you have tried, but for a device that is displaying that it is disabled, this is the support document to follow. If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

If you are experiencing something else, you need to do a better job of describing your problem.