8 
4 
3 Earpiece sound distorted and too loud after screen replacement
My earpiece during calls is too loud even at the lowest volume setting. It's so loud that it even distorts the sound of the other party speaking.
I replaced my iPhone 4 display twice and disassembled it several times more to fix stuff I have overlooked due to my lack of experience.
Now, that earpiece problem appeared after the second display replacement.
I changed several firmware versions inbetween the assemble/disassemble games so I'm not excluding a software issue as well, but I was wondering if there's a possible hardware reason for that - something I messed up when I was assembling it back.
Thanks for your input.
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