Who called from 5706188686

Received a call from this number on my mobile phone.  Did not recognize the number so did not answer.  Assumed another scam call...

They called. No message.

Missed call, no message

Same here. When I don't recognize the number I click "can't talk right now. Text or voicemail me" If they don't, they get blocked.

called, did not leave a voicemail.  I called it back and a recording allowed me to block my number/add to the do not call list.  Must be a sales call.