i have been using my s7 in fully protected case for just 2 weeks n there are scratches on its fingerprint sensor(home button). the build quality of samsung has never been good but for a flagship phone like s7 I expected better
been using my samsung for about 3 month now, not even 1 scartch and im not using a protective case...i think there might be an issue with how you use your device instead of the " build quality" of the phone...
