Thank you for your comment. When I posted this, I didn't realize that my vibration wasn't working at all, but you're right - it wasn't. I just so happened to have had an appointment at uBreakiFix yesterday, and they tested the vibration motor and something with the word "pin" in it that connected to the vibration motor and they said that wasn't the issue. They needed to replace the charging port on my phone because it wasn't sending power to the vibration motor. I've never had this happen before since I've owned a Samsung phone.
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