I believe this is a scam or robo call, it does go to voice mail, the caller keeps saying hello, hello. This voice sounds familiar from other calls I get from different numbers. Apparently he doesn’t comprehend what leave a message means.
Scam, info below:
Make $3,768 before Christmas
Rply YES to-see-how
You Could also Reveive a $600 Welcome Bonus
txt 7 to end
never says anything then hangs up