Q: How can i understand that my iphone is lock and into blocklist of att carrier?

Where did you acquire this iPhone?

What is the exact wording of the error message?

If the iPhone is locked to AT&T, you must contact AT&T to see

if you qualify for unlocking.

https://www.att.com/deviceunlock/client/en_US/

http://www.att.com/econtactus/callUs.jsp

Try using the sim from a friend's iPhone to see if there is a problem

with the sim.

Did you recently update the iOS version on that iPhone or restore it?

Which version of Cydia do you have? The one with the orange icon? If

not orange, which color?

davoudeco wrote:

 

how can i contact Att ? do you have email or some thing like this.?

Are you not capable of going to their website and looking for contact information?????

No one but the provider blacklisting the iPhone has that information. There is no

public database of blacklisted iPhones.

What makes you think your iPhone is blacklisted?

You can check if your phone is blacklisted in the US here: http://swappa.com/esn

No. You can't actually.