[IMPORTANT] Acrobits Softphone for iPhone
An issue has been found in iOS 5.1 that causes the microphone to crash when the headphones are plugged in on some devices. Due to this problem, there will be no outgoing (and probably incoming) audio.
The app development company has already reported the issue to Apple and hopefully they will be able to resolve it soon.
Fortunately, the problem only occurs when using plug in headphones. If the app is used without headphones, the issue will not occur.
If you need to use headphones, please go to the Acrobits Softphone preferences and under sound, turn echo suppression off. This will correct the problem.
The app development company has already reported the issue to Apple and hopefully they will be able to resolve it soon.
Fortunately, the problem only occurs when using plug in headphones. If the app is used without headphones, the issue will not occur.
If you need to use headphones, please go to the Acrobits Softphone preferences and under sound, turn echo suppression off. This will correct the problem.