According to this Link [theregister.co.uk]
, you may be eligible for $10 if you have owned Samsung Galaxy S4.
As per link, The case was brought back in 2014 when testers revealed that Samsung appeared to be cheating on benchmark tests – frequently used to compare the speeds of different phones in reviews – by adding source code that detected whether a benchmarking app was running on the phone, and if so, ran the phone at a faster speed (532MHz rather than 480MHz).
Follow the link for further instructions. $10 is not too much, but atleast something better than Nothing.