When you don't know if you iPhone is carrier unlocked or not, this is what you get. He bets that it's carrier unlocked but it clearly says it's SIM Locked. If it was unlocked, it would say No SIM restrictions. It's locked on T-Mobile. So if you put a different carrier SIM card, it will just say activqation required then you'll see when you try to activate it, it says SIM not supported. So everyone watching this, I hope this teaches you this lesson. If you own an iPhone, to know if your phone is unlocked or not, go to Settings > General > About and scroll down till you see Carrier Lock. If it's unlocked, it would say No SIM restrictions. If it's locked, it would say SIM Locked. Remember people, believe that it's locked if it says SIM locked, or believe that it's unlocked if it says No SIM restrictions. Do not bet anyone about this, just believe that if they tell you it says SIM Locked/No SIM restrictions, just believe what they say and look in the phone settings to see if it's true. If it says SIM Locked or if it says No SIM restrictions, just believe what the phone says and do not bet them that it's the other way, just think that if it's saying SIM locked, then believe that, if it says No SIM restrictions, then believe that. Don't bet anyone about that oh it's the other way around because you will end up losing the bet and losing a lot like what happened in this video, he lost his iPhone. If you use an Android device, you can contact the carrier to see if it's unlocked or not or on certain carriers like T-Mobile, you can check the carrier lock status by logging on to your account and going to your device and looking at the carrier lock status. If it says that it's unlocked, then it should be unlocked on your device. If it says it's locked, then it's likely you can only use the carrier that it's on. I hope this video teached you a lesson.