Hi all, during a phone call I stablish contact using a loudspeaker only.
I had this problem twice. First time ten days ago. After 3 days with  this malfunction, as magic, it worked again for my hapiness!!
But yesterday, the same silence at ear speaker happen again.
Anyone can help me before send it to store? it is still under warranty, but I am at Rio , Brasil and I have to send the Iphone to London, England.
Thanks