Is There Any Way To See If The Homebutton Is Original Iphone 7

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Hey, is there any way to see if the homebutton is original? Got one that dosent work but i dont know if they replaced it before so it dosent work because of that. I also got one that I do know is original. Components looks the same, the qr code dosent. and numbers on the flex is: 821-00912-02 MFC3116 dont know if that one is original. The one I know is original says: 821-009 MK12-02. Thanks for any ansers.

To be blunt does not matter if it’s original or not. The only home button that will ever work on an iPhone 7 and higher is the same home button that came with the phone.