hi guys, i recently bought my 3g iphone (8gb). then i realise that only 1 out of the 2 speaker below the iphone is working. i went back to the shop and tried to warranty it and the man told me that it was normal. according to him, all iphones (1st generation and 3g models) have the same problem. only 1 speaker is working at all time. he said it was posted in the internet as well. is it true?