Did not mute my microphone (HTC Thunderbolt) I installed the widget, set it to "ON" and made a test call. I tried using the power button to engage the mute feature, but the microphone did not mute successfully in any of my tests. I was able to get a refund within 15 minutes, but I would like to purchase this app if it can be fixed for my device. (Also, the widget takes up 4 horizontal spaces, two of which are blank space - app could easily use 25% of the space by using the microphone icon and just putting a red slash through it when it's engaged)
Didn't work on an HTC Incredible running OS 2.3 too bad. Great idea, totally dead app. It's a widget by the way....don't expect an icon on your app. screen. That's not clear from the description either.