This would be because the app is your default messaging app (Android 4.4+). If you want to remove SMS fallback, you need to set another app to act as your defau

This would be because the app is your default messaging app (Android 4.4+). If you want to remove SMS fallback, you need to set another app to act as your default SMS app. There is actually an issue on github open about this: https://github.com/WhisperSystems/TextSecure/issues/639 https://github.com/WhisperSystems/TextSecure/issues/639