People Can't Hear Me Talk iPhone 4S?

About a week ago, my iPhone 4S stopped allowing people to hear me talk when I make phone calls. I have tried restoring my iPhone, and I have tried cleaning out the headphone jack. Neither of these things have fixed the issue. If I put my phone on speaker when I call people, they can hear me, but EVER so quietly. People have said to see if my voice is recorded when using voice memos, so I tried that. Sure enough, I could hear my voice after recording. So I'm just really not sure what the problem is, and this issue is making it very difficult for me to talk to people on the phone.

Have you dropped the phone? Wires inside could have came loose, check there's no dirt covering the speaker

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