Iphone 4 receiver not working so cannot hear caller
Hi
My iphone receiver has stopped working after two weeks, If I switch to speaker phone I can hear, or if I use a headset.However for normal phone use I cannot hear the caller. Have been through the various trouble shooting steps including restoring the phones. Any ideas or is this a return for service issue.
iPhone 4, iOS 4.3.2, 4.3.3 installed