Some iPhone 6s and 6s Plus devices may suddenly refuse to switch on due to component failure, and Apple has launched a repair program to fix them for free. While the tech giant didn't say what parts are prone to failure, it said the issue only affects devices manufactured between October 2018 and August 2019. That's after Apple discontinued the model in the US following the announcement of the iPhone XS and XR, but as Bloomberg noted, the company continued selling the 6s models in select markets like India.