this number has called 5 times today and you call back and its busy. 2 days in a row that a different number has called me same result

trying to retrieve personel info and wanted a credit card number

Keeps calling, but hangs up when I answer.

They called my cellphone about 12 times .. I never picked up but when I tried to call back all I got was a busy signal.

I too have just started to get these weird calls on my phone. I was told by a friend to not answer them or to call it back. Unfortunatly i already had but i guess if they dont quit you should change your number. supposably they could somehow get into your phone account and use your number and its not good.