Who called from 3128091206

Same thing here today:

"Rang mobile. Rang twice. Hung-up."

Kind of worthless for a telemarketer or scammer to do this...

Rang mobile phone twice. Hung up.  Registered as a "missed call."

Same as above - rang twice hung up. No message.

rang only once then immediately hung up. My guess is that they expect people to call back since most people these days always call back missed calls as if it is so important.  If they don't leave a message, I never call back.  Too many scams that charge you by the minute for spoofed calls when you have no idea where they are originating out from.

Rang one, then hung up.  I never call back a strange number either unless they leave a message.  Curiosity will NOT kill this cat!  :-)