Hey I have been problem hearing while making calls I put my volume on full. Both me and my brother have iphones and we both have the same problem and I was wondering if any one else was having this problem. I can hear, but when I am at a store or something where they might be some noise, and I do not mean loud, it is very hard to hear so I have to use speaker phone.
MacBook, Mac OS X (10.4.10)
Make sure the plastic cover that came on the phone glass is removed. It covers up the speaker for your ear.