SD Speed Increase

This is a great app for Root users. I tried it on a couple of phones and could immediately tell the difference. When you open the app you will see your device is set at 128kb set it to 2048kb and hit the little orange button on the bottom right to save it. 

If you do not hit that button it will go back to 128kb. It took me a couple of times to figure out I was doing it wrong. That could also lead you to believe the app does not work.