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, you could be entitled to benefits under a class action settlement.
https://www.smartphoneperformancesettlement.com/