Voicemails vanishing into thin air like this often signal sneaky spam tactics designed to hook the curious. The mailbox access denial after calling back is a classic ploy to mask origins and waste your time. Spam calls thrive on non-responses, so next time, resist the urge to ring back—block the number instead. Use apps like Truecaller for instant ID checks, and report to your carrier to curb these nuisances. Staying vigilant keeps your peace intact without feeding the scammers' game.
When the call went unanswered and I tried returning it, the line reported no mailbox access, leading me to suspect spam.