On my payment for October month I saw this phone number and T-mobile charged me. I've never called by this number, and I, even have never got a phone call to this number.  

10/07/09  Winnipeg, MB  2:23 PM  204-928-9003   19 (min) -  $7.41  7.41  
10/07/09  Winnipeg, MB  2:45 PM  204-928-9003   14  (min)-  $5.46  5.46  

T-mobile did not charged me for these min, but I am not sure it will not appear in my payment statement at the end of every month.
How to solve this problem?

This ph.#:204/928-9003 was charged to my Sprint bill, saying I had called this # on 11/2/09, for 15 min.,from my landline.  I dont use my lline to make calls, nor do I know anyone in Winnipeg,Canada, nor would I ever have any reason to call Canada. There is some kind of scam going on here...I think scam is putting it mildly. I am opening a dispute w/Sprint. In my search for 'who is this'?--I ended up at this site, and see that someone else has posted same situation,w/same ph#.

This is actually listed as a Call Support Center for various dental/teeth whitening products.  They are complete scams.  No one ever answers the phone and they charge credit cards over and over again.  Not sure how they got to calling you and using your minutes.  Very interesting.

I am also a victim of this kind, I have been billed for $5.88 for this call that i haven't made,. I called my phone company  regarding to this matter but they insist that the call was made in my phone, but they will look farther and they will let me know what they will find out...

We received a charge on our March 2010 bill for $7.32 to this same number, supposedly called from our business at a time when we weren't in. I called our phone company and was credited for the call.

Apparently the number is used by Healthbuy.com.