Mute speakers on calls and most apps - Music plays on speakers
Hi!
My iPhone 4 (iOS 5.1) doesn't make a sound on it's speakers when receiving a call or using apps
However music plays on speakers as well as some apps like "Magic Piano". Youtube uses speakers correctly, too.
Vibration works when getting a call, but no sound. Turning vibration off doesn't make a difference.
Testing the ringtone works fine, too, but I don't hear it during a call.
When using headphones all apps produce the sound they should and incoming calls play the ringtone, too.
Changing volume level doesn't make a difference.
During a call I can turn on loudspeakers without a problem. Mute works as expected, too.
But no matter what I do, all incoming calls stay silent and most apps and system sounds like keyboard clicks are muted.
I missed numerous calls because of that, so how can i turn the sound back on?
iPhone 4, iOS 4.3.3