I have downloaded the InteractPlayer 3.4.355 on iphone 4S, After sharing my App. I can run the App with no problem, all the click, turn pages, actions go well. However, the sound on the App can hardly be heard, as the sound level is very very low, as it through the internal speaker of iphone4S. I have turned it up to the highest. But when I use a earphone to listen, there is no problem at all. Why can't I hear the sound via the internal speaker?
Customer support service by UserEcho