A person contacts you, then says they need you to verify your age etc by using a code, they want your phone number to call you with another code to verify. Once you confirm it, they somehow scam your phone number...

Session transcript between Thomas (Support) and Ron initiated Sat Jan 23 2010 12:18:46 GMT-0500 (Eastern Standard Time)
[Jan 23, 2010 12:18:46] Thomas:
Welcome, I am your live chat representative. The conversation code 006776 appears to be associated with Kayla B. Is that correct?
[Jan 23, 2010 12:19:30] Ron:
Yes
[Jan 23, 2010 12:19:41] Thomas:
Could I have your phone number and Zip/Postal code. You will receive an automated call in a few minutes with a 4-5 digit verification code.
[Jan 23, 2010 12:20:16] Ron:
519-770-0005 N16J
[Jan 23, 2010 12:20:34] Thomas:
I will now use your info to do a quick verification check. You will receive a call in a few minutes with a 3-7 digit confirmation code. It is vital that you do not give this code to anyone, and simply type it here when you receive it. Please standby for the call. Typical wait time is 3 to 6 minutes.
[Jan 23, 2010 12:22:12] Ron:
Is this a scam of some sort???
[Jan 23, 2010 12:22:55] Thomas:
No sir. I apologize for the delay I just have 9 different people on my screen
[Jan 23, 2010 12:23:40] Ron:
All using that code? WIth Kayla B?
[Jan 23, 2010 12:24:35] Thomas:
No for different people sir. I am an operator at a call center
[Jan 23, 2010 12:24:58] Ron:
Where is the call center located?
[Jan 23, 2010 12:26:21] Thomas:
It's in bangladesh sir. I just sent your call
[Jan 23, 2010 12:26:21] Thomas:
1N0qD9yk
[Jan 23, 2010 12:27:21] Ron:
60541
[Jan 23, 2010 12:27:21] Thomas:
I just sent your call sir. May I have your confirmation code?