How to know if IPhone is blacklisted?

I bought an iPhone 4 from a guy but when I went to unlock it the guy at the unlocking place said it was blacklisted how do I know it's really blacklisted its and IPhone 4 for AT&T?

You would know if no active SIM card works in the iPhone (it says No Service no matter what sim you put in). There are also services that you can pay for that will tell you whether or not it is officially blacklisted (reported lost/stolen)

  • Will my iphone be blacklisted? I just found a Iphone 4s on the ground with the password. I want to reset it to factory settings but I'm worried that the phone will be blacklisted. Will the Iphone be blacklisted if I reset it to factory settings? @Bane, are you trying to say that I stole it? You, you filthy cotton-headed ninnymuggins. So @AVDADDY I can use the phone if I reset it to factory settings or not? @Bane YOLO But @Jon Yoda Can I use the phone if I reset it to factory settings?
  • Will i get caught using a blacklisted iphone 4s? I found one but it is blacklisted, i wanna use it as an ipod but i was wondering if i could get caught by putting the sim card in and leaving it there. I hate that no sim message. Phone i already activated
  • Sprint iPhone 5, Blacklisted IMEI? Okay, I bought a blacklisted IMEI, not knowing that its not usable. But I was told that I can get the phone unlocked, or something like that. If I get that done, can I use the phone on Sprint?
  • I've been sold a blacklisted iPhone? I recently bought an iPhone 5c from Game, who told me the phone was ex-contract. However, after owning the phone for 3 days it stopped working and I finally found out it had been blacklisted. I'm going to be able to get a full refund from them, but I was wondering if I'd be able to get any compensation at all for wasting my time, and for breach of contract. Any advice would be helpful!