866-610-4109

Called me on my cell phone.....answered but no one was there.

Keeps calling my phone and there's music in the background. I am on the FCC do not call list. Don't pick up!! Scammers.

Calls on my cell phone, doesn't leave a message, I called back it seems to be T-mobile trying to get you to sign up for something.

Same here, calls, no one there when I answer either.  Haven't bothered to call back, called again, didn't answer.  Annoying!!!

Called back, "Kyle" answered and said it "T-Mobile Research Department"

T-Mobile telemarketers.

got called 4:33pm answered no one answered

T-Mobile marketers? Called me during class so I couldn't answer, but I don't recognize the number.

Area Code 866 History:

07/29/2000

Area code 866 was put into service. With toll free numbers the charges are paid for by the party who is called instead of the caller. Although area code 866 is not assigned to a geographical area, calls to any toll free number may be restricted by the customer. Other toll free area codes are 800, 866, 877, and 888. Area code 855 is scheduled to be implemented on October 1, 2010 as a toll free number.

I've received calls from this number three days in a row now. it's stating to get pretty annoying. Like everyone has said, no voicemail just random phone calls.

got it call from this number they las 4 digit of credit card number...also they said they are from wells frago....dont give them any information...

We just switched over to Verizon (THANK GOD!) and now I am getting these phone calls as well.  We own T-Mobile NOTHING, but yet still getting the calls.  

Take a little advice, get off the sinking ship that is T-Mobile.  They are about to go bankrupt and need 63 billion dollars to stay afloat.  Don't see that happening.