LOUDSPEAKER
Making a call is only possible throught the loudspeaker... No normal call is possible...
iPhone 4, iOS 5.0.1
Making a call is only possible throught the loudspeaker... No normal call is possible...
iPhone 4, iOS 5.0.1
Thanks for sharing.
There might be something in the headphone jack, maybe lint, dirt, or something else in there.
Try disconnecting the headphones and then adjusting the volume, does it say headphones?
Take a look at this Apple document for more information -> iPhone: Can't hear through the receiver or speakers
LOUDSPEAKER