Taking apart an iPhone is absolutely trivial, relatively speaking. Good repairers can do component-level repairs, even on the weird sandwich PCB on the iPhone X. They can splice together two flat-flex PCBs to repair a TouchID home button. They can restore iCloud-locked devices by removing and reprogramming the flash memory. They can separate the individual layers of a sandwich LCD screen to replace just the cover glass or the digitizer. There are aftermarket suppliers of iPhone X screens, complete with the notch and 3D touch. Third-party iPhone repair represents the absolute cutting edge of electronics repair. The level of precision and ingenuity on display is simply staggering.