: Delete the thread and block the sender's number.
: While MP3s are generally used for audio, files sent via MMS can be used to deliver malware or exploit vulnerabilities in your phone's media player. RJ363500.mp3
: The message may claim to be a receipt for a large purchase (like a high-end laptop or jewelry) that you never made, using the audio file as a "voice confirmation" or "invoice". : Delete the thread and block the sender's number
Protect Against Smishing, Spam Text Messages, and Text Scams | Verizon Spam Text Messages
: Forward the suspicious text to 7726 (SPAM), a free service used by most carriers to track and block scam numbers.