How to know if my iphone is unlocked? - 1

I unlocked it through unlocksexpress and synced it to iTunes and got a message that said congrats your iphone is now unlocked. It it really? When I take my att sim out for a metro will it now work?

If you have another providers SIM, or If you have a friend who has a SIM card that is any provider other than AT&T, ask them to borrow it. Put it in your phone.

If you get connected, then your phone is unlocked.

If it is unlock, then you will be able to use it to different carriers. So no need to worry about it.