A lady called me from this number from Dynamic Recovery Solutions and identified my correct name but the last 4 of someone else's social security number. She told me about a delinquency on payment of a Sprint bill. I repeatedly told her she had the wrong person but she would not listen so I hung up on her. Then I called back to see if the number was legitimate and another lady answered and identified me again and I explained she had the wrong person and she said "sorry, I need to terminate the call now". I have no idea how they found my phone number matched to my name when it was a totally unrelated case.