Samsung has agreed to pay purchasers of its Galaxy S4 phone, released in 2013, US$10 each after the company allegedly cheated on benchmark speed tests. The South Korean mobile giant agreed to the payment to settle a long-running class action lawsuit for $13.4m.

The case began in 2014, when testers revealed Samsung appeared to be cheating by adding source code that was detected when a benchmark app was running on the S4 and speeding up the phone accordingly.

Samsung has never denied the test claims, but fought the case, arguing it was not legally obliged to tell consumers it included the code. It now says it will send the 10 million people who bought a Galaxy S4 in 2013 an e-mail with a link to apply for the $10.