I realize this may be an odd question for this forum, but I have tried on other forums with no help. I purchased a Droid Incredible on craigslist a few months ago. The original owner used the phone on Verizon. After purchasing, I put the phone on page plus. (Page plus allows only Verizon's phones, no flashing required, no messing with software at all.) anyway, I was recently approached by a girl with a Droid X who wanted to trade her X for my incredible ... Of course I said yes. She really had no knowledge of phones so she insisted on meeting at a Verizon store so the workers could do it all for her. Fine. I switched my ESN from the incredible to an old moto q that we have for this purpose, about an hour before. I get to the store, and the worker tells me my phone won't work on Verizon ... Which is far from true. It's a Verizon phone, and I have done this numerous times without issue. I finally convinced the guy to attempt the esn switch for her. He tried, and told me, "the phone is active under another account." which was all the info he could give me. I immediately thought maybe the previous owner sold me a phone with a bad ESN, but somehow I activated it before it was blacklisted.??? So, I nervously attempted to put my incredible back on my page plus account ... Thinking the esn was now bad, I wouldn't be able to ... Nope, it activated without issue back on to page plus. My question is, is it possible that my esn is bad, though it seems unlikely as I was able to reactivate, or is it possible that the network was slow and the esn had not been completely cleared from my account, and therefore showed up as being active?? I want to sell my incredible, but I don't want to sell it thinking the esn is fine, then subsequently, screwing someone over .... Any help would be much appreciated.