is a small motor with the shaft off center. It's probably replaceable. Maybe. But you'll need to get inside.
Wjenever my iPhone 3Gs vibrates, the internal vibrator sounds like it's scraping against the inside of the phone. This suddenly happened today, it was okay yesterday, and I have not dropped or knocked the phone in any way.
I can't bring it to an Apple Store since my warranty has probably already expired. Any suggestions on what to do?

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