This weekend I came to my parents house and I got a letter from Cavalry Portfolio Services. They apparently bought my "debt" from Sprint and say I owe $320.21. I have had a cell phone with Sprint for the past 4 years and have always paid my bill. How could I possibly have a debt with them and they allow my current phone to still be active?? I've been reading up on this company and they appear to really be shady. I'm debating on what I should do about this. I checked my credit report and I don't have a debt in this ammount, but I want to make sure this crap won't show up on it. Is there anything I could do short of calling an attorney? I really don't have the time for this crap since I'm in summer school..