Deleted the only recording of my Grandmother's voice

My dad was playing a voicemail he had saved of his mother calling him. He accidentally erased it, and I need to get it back. This is the only recording of her that he owns so this is really important to me.

His phone is running on Android 4.1.2 . I have been googling **** for an hour. Some people have suggested solutions that work via Visual Voicemail, but his phone will allow a subscription. I have tried data recovery software, but they all charge $50 and I can't even confirm that they...

Deleted the only recording of my Grandmother's voice

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