I did a quick search and found some posts that were similar to my issue, but not exact. So, here goes: Currently, when I make or receive phone calls on my iPhone, I can connect to the caller on the other line, but I cannot hear him, and he cannot hear me. But the call is clearly connected. Switching to speakerphone does not change anything. I still can't hear anything from the other end. So I don't think it's a problem with the earpiece speaker. Also, if I play sound by doing pretty much anything else, such as using another app, or going through the ringtone options, the sound works perfectly fine. More perplexing still, I have some apps that use the microphone (such as Soundhound), and they all register sounds without issue. SoundHound was able to identify songs without problem. So, to summarize, all speakers and the microphone seem to work fine except when being used to make a phone call. A little more background: I recently dropped my iPhone onto some rather hard, concrete, tile. It landed flat as a pancake on the front screen and, predictably, shattered the screen. It was at this point when the issue described above began happening. So I assume something broke inside...I just need to know what so I can replace it. I replaced my screen without much issue, but still need to resolve this phone call thing. Also, I did have AppleCare and did take it to the Apple store. Unfortunately, however, they tell me that the version of AppleCare I have was sold before they started the offering the version that allows full hardware replacements. As such, they wanted to charge me $200 to fix the front screen, plus whatever it'd cost to fix the phone call problem....which is ludicrous. I am eligible to upgrade, but want to wait until the next version of the iPhone is available before I do that. So does anyone know what part could possibly need replaced to resolve this?