When i try to call using the phone dialer I cannot hear the person receiving the call nor can they hear me. If I use speaker phone same results. It's almost as if the speaker and receiver on the phone just shut down. However, if I use an app called TalkATone, it works fine just like a normal phone should. So I know the speaker, mic, and the receiver end of the phone are working fine but just not using the native dialer. Any ideas?