Are you sure it was specifically blacklisted? It wasn't "not whitelisted"? When I gave my developer edition Galaxy S3 to a friend, having bought it unlocked an

Are you sure it was specifically blacklisted? It wasn't "not whitelisted"? When I gave my developer edition Galaxy S3 to a friend, having bought it unlocked and used it on Sprint, I had a dickens of a time trying to help them use it on Verizon. Eventually, the answer I got was not that it was different from the version they were selling, nor was it incompatible at the radio level or otherwise wouldn't work on their network, nor did they think it was stolen or otherwise blacklisted, but that the IMEI wasn't prefilled in Verizon's database and they wouldn't add it because we didn't buy it there. Verizon lost a customer that day. Since then, between myself and my friend and our families, we've probably paid in $6,000 to other carriers in the last 36 months.