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Answer to "iPhone 7 problem with aftermarket screen"Ifixit parts are reliable. More expensive, and a little longer shipping, but the best I’ve found. Others often work well, but ifixit has always worked well for me. Regretting having bought a cheaper 7+ screen. Jeff Suovanen @jeffsu gave a good response re compatibility, (on the repair guide)and this link: https://webuylcds.co.uk/2018/05/15/touch-compatibility-issues-with-iphone-7-7-8-8-screens/ It looks like you have to take apart the screen to find the serial number. Unfortunately, the screen in my repair doesn’t match any of these, but it may be helpful.