What are AMR files in my phone?

I was uploading things from my Galaxy phone to computer. I clicked on the Sounds folder, and see three AMR files. The files don't seem to play, even when i try to convert them. I'm confused because I see the name of someone I dated, but the file was created and modified before i met them, which doesn't... show more I was uploading things from my Galaxy phone to computer. I clicked on the Sounds folder, and see three AMR files. The files don't seem to play, even when i try to convert them.

I'm confused because I see the name of someone I dated, but the file was created and modified before i met them, which doesn't make sense to me. I can't think of a reason I would name something "Audio message_Lawrence_001"

I have no idea what this is? One is 7.94 KB, 70 bytes, 6 bytes.
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