A Veteran Here to Help!
If the volume is turned all the way up and you still can barely hear something, either the speaker is damaged or there is some particulars that is there that is lowering the volume. I would suggest taking it to a store and having them check it out and possibly exchanging it for. Phone should still be under warranty.
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Stupid question: Do you have a screen protector on it? Make sure the ear piece is not covered by the plastic cover.
If thats not the case, you will need to have the phone exchanged provided there is no physical or water damage done. open the battery door and look for a "white" square, if you see it youre good! "if its red, its dead"... lol I dont know if youve heard that saying before, but it made me chuckle... GOOD LUCK!
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