(866) 456-0575

This happened to me too. Exactly the same. And THEN a guy showed up at my door looking for three packages from sprint that had been "mistakenly" sent to my address. Total fraud.

I received a call in which the caller claimed that they needed more info to process my order and that they were going to cancel it if they did not hear anything from me in three days. Since I have placed an online order recently and did not hear clearly which company the caller was representing, I thought that I should better call to see which order they are talking about. I selected auto redial from my voice mail prompt and I reached Sprint. I hung up the phone because I did not order anything from Sprint. I should have just left it alone, but I decided the call the number (866-456-0575) that the lady left on my voice mail. And that number also rang to Sprint. The recording said, "Thank you for calling Sprint." And then after that, a gentleman came to the phone and I told him that I received a call about an order. He asked me if I placed an order with Sprint and I said no. He then asked me for my full name. Instead, I gave him the order # that the lady left on my voice mail. He checked it and said that he did not find anything. He then asked me to provide him with my full name so that he could check under my name. So I did provide it to him. He checked and said that he did not find anything. He then asked me to provide my social security number... That's when I cut him off and said "Absolutely not." Then I hung up the phone.
What I did afterwards is that I went to the Sprint website and called two numbers that I found there. In both numbers, the recording says, "Welcome to Sprint..."; not "Thank you for calling Sprint."
If you receive any call similar to this, I suggest, if you answered the call, that you do not give them any of your personal information. And if they left you a voice mail, I suggest that do not call them. Resist calling them.