Who called from 3128091206

That number called me while was in the other room & they didn't leave me a mobile number.

I just got a call from this number. One ring and a hang up. I never answer calls from, nor return calls from unknown numbers. Another site said this number is a scam.

Same as others - one ring and hangs up

Same as others, rings one time and hangs up, they did it 2 times in a hour.

Rang mobile. Rang twice. Hung-up. Another spam site reports similar hits to mobiles with two ring hang-up.