To purchase an iPhone screen replacement, go to a merchant website such as Amazon and search for the screen specific to your iPhone version. Forbes suggests finding the screen replacement on Amazon or eBay, then replacing the screen manually with tools.
While Apple offers a service to iPhone owners to replace damaged screens, the service costs anywhere from $109 to $129, according to Apple's website. This includes the new screen along with the manual labor required to replace the screen. To do this, start a service request on the website, ship your phone to Apple and wait for the repairs to finish about five business days later.
To replace the screen on your own, look for a screen on Amazon or eBay that matches your iPhone version, preferably one that includes the tools needed to replace the screen, suggests Forbes. Complete screen sections cost more, but include components such as the home button. When you purchase this type of screen, simply detach three cables inside of the phone and attach the new screen. To save money on the screen itself, purchase the screen element alone; however, this requires you to transfer the home button and other features over later. Full replacement kits include a star-shaped screwdriver, a suction pad and the replacement screen.