This is a warning for those who plan to buy used Sprint cell phones from auction web sites like eBay. This week I purchased two cell phones from eBay. Item: Sanyo Katana 6600: Only used for 3 months. $86.00 (Texas) Item: Moto RAZR V3M: Only used for 5 months. $96.00 (Miami, Florida) Both items are in excellent condition. When I tried to activate them, Sprint reports that the ESN for the Katana has an outstanding balance of $1900. I contacted the previous owner and the lady claims that she has a receipt of cancelleation and she paid $500 when she cancelled. She faxed the documents to Sprint. Still problem not solved. Razr seller according to Sprint his account is suspended and has a current balance. Also Same problem. Both units can't be activated no matter what. I have check on other customers with the same problem when the buy used cell phones. According to previous user this Razr was cancelled. I don't know who to trust since this month my Sprint bill came high because on October 4th they said that I activated new services and features for my cell phone which is a Samsung A640 but the funny thing is that I never requested anything and they don't even have the name of the person who activated the services or the customer service rep who activated the features since they told me that this features where requested by phone. Incredible as it sounds there is some fraud going on. People watch out. If some is trying to sell you a used phone or new phone always request the ESN or DEC number. Once you have it call Sprint to verify the status of the ESN if they have and outstanding balance or delinquent fees. Do not trust anyone no matter what. I am a Sprint customer for years but honestly I am very dissapointed.