https://www.smartphoneperformancesettlement.com/submit-claim.php -you qualify if you are or were a U.S. owner of an iPhone 6, 6 Plus, 6s, 6s Plus, and/or SE device that ran iOS 10.2.1 or later before December 21, 2017, and/or a U.S. owner of an iPhone 7 or 7 Plus device that ran iOS 11.2 or later before December 21, 2017. If you no longer have the device you can use their search tool to find the serial number(I wasn’t able to get this to work).