I received the same "one ring, anonymous call" shortly after I made an online pmnt for an application fee. It's interesting you would mention PayPal because that is the method I used. Maybe there is some connection.

What an idiot

called 8:31pm no message

Here it is nearly a year later since this thread starting and this is still going on with THIS number, among others.  I get one of these calls EVERY TIME I add more minutes to my Net10 Pre-paid phone.  We use CALLINGMART.COM which is a third party sellor of minutes, and we pay by PayPal so these INDIAN SCUMBUGS cannot get our credit card info.  Put minutes on two days ago; BAM!  Call today.  This pattern has been repeating for YEARS.  So, I KNOW it is ONE of these two INDIAN companies: NET10 or CALLINGMART.  I HATE doing business with them, but its the cheapest thing available in our area, other than doing business with Walmart, whom I also hate.  REFUSE to use Verizon or AT&T or the other 'large' carriers.

Call Type: PHISHING SCAMMER/FRAUDSTER/THEIVES
Caller: CALLINGMART.COM or NET10

Try Virgin Mobile.