Call Volume Booster app will increase your call volume to its MAX LIMIT automatically while calling someone or receiving any call.Call Volume Booster has very simple user interface to start and stop the service.Call Volume Booster will increases the call volume WITHOUT CHANGING YOUR PROFILE (Silent, General, Vibrate)."THIS APP WILL NOT INCREASE YOUR RINGTONE VOLUME" so if you want to increase your ringtone volume then please don't download this app