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My iPhone 7 plus home button is cracked. I called apple , they said to walk in to service center. Will I get its water resistance after replacing the home by apple service center

Hi, Quick answer is that if you go into an Apple Authorized service center (or into an Apple Retail store) for service that feature of the phone would be maintained. Apple has very strict repair guidelines for Apple Authorized service providers. If you go to a 3rd Party repair shop there would be no guarantee. Here is the website to check for Apple Authorized repair stores in your area: (In case you do not have an Apple Store in your town) https://locate.apple.com