If you have a smart phone, spend about 20 bucks and buy yourself another digitizer, screen, and all the nice little tools that let you open it up and replace parts. You'd be amazed how much money you'll save on repairs from a store or (god forbid) the manufacturer and how much more life you'll get out of that device.
Unless you've got one of those newer phones where everything on the inside, including the battery, is fucking glued together; in which case, just save yourself the trouble and put a bullet in your brain.