The speaking lessons no longer work properly on my Samsung smart phone. The mic works just fine in all other apps. The problem is strictly with Duolingo. From reading the comments from other users if Duolingo, I know I am not the only one experiencing this issue, and it has been going on for months. Going to go try one of their competitors now. Way to go Duolingo devs, you're literally forcing your customers to go elsewhere to get a fully functional product.