@Sandraaa You have a screen protector installed. You can tell by the cutout around the camera hole. I would remove the screen protector to see if those spots are due to the screen protector or the screen itself.
@Sandraaa Thank you for reaching out. You can information on the requirements for trade-ins using this link: https://www.samsung.com/us/trade-in/device-trade-in-faq/ For additional information you would need to reach out to the E-Commerce team directly by calling 1-855-726-8721.
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