Just got a new iphone 4 here and I think the earpiece speaker isn't working. As I have no SIM for it I am using the Voice Memos app which has a replay option for the earpiece speaker or the bottom loud speaker. Could someone verify that the iphone 4 voice memo app on 4.3.2 will play on both the earpiece and the bottom speaker? It works that way on my 3gs and acts like that on the 4 but I just don't hear anything on the 4, the proximity sensor does blank the screen when trying though. I got the phone off ebay and apple shows that it is under warranty still, think they will swap it even though I am not the original owner?