ITunes error while activating iPhone recently unlocked with AT&T

Question

Hello , I called AT&T about 15 days to request an unlock for my iPhone. Yesterday I got the confirmation email explainig that the IMEI number was unlocked and that I should follow this steps to unlock it:
To complete the unlock, simply:
1. Open iTunes on your Mac or PC and verify that you have internet connectivity.
2. Connect your iPhone using the dock connector to USB cable that came with your iPhone.
3. Backup and restore your iPhone using iTunes .
For information on backup and restore, please visit http://support.apple.com/kb/HT1414.
4. After restoring, your iPhone will be unlocked.
Well I have done that. And the iPhone won't activate. I have inserted my sim card from Argentina (TELECOM PERSONAL is the company) but when I connect to iTunes it gives me this message:
Your request couldn't be processed. We are sorry, but there was an error processing your request. Please try again later.
I have, too, tried to do it through the iPhone, in the activation screen (where it is stuck, by the way) but the same, error message.
Do you know how to help me? I have called several times to AT&T and the confirm and reconfirm that the IMEI is in fact unlocked. I can provide you the IMEI if you need it, to further checks.
Please help me. The iPhone is on the activation screen and AT&T told me the IMEI has already been unlocked.
Kind regards

Answer 1

Hey there!
Wanted to do some follow up on this issue. I requested the phone to be unlocked again but nothing changed. I ended up calling Apple and then AT&T and then back to Apple to find someone who was willing to do something for me. It seems this is a pretty major issue and it's pretty difficult to get it solved.
They had to transfer me to a Senior Advisor who after listening to my explanation concluded that this had to be forwarded to the Engineering Department and for this he had to create a ticket and do some folllow-up. That was last tuesday I spoke to them. Ever since that conversation he has called me two or three times asking for additional information (ICCID of the SIM Card being used to activate the phone, carrier with which I wanna use the phone with, etc). He told me I should hear back from him again tomorrow hopefully with a final response from the Engineering Dept. and a solution to this crazy issue.
If you haven't taken these steps yet, I'd recommend you to be reeeeeaaallly patient as it takes some time for you to get them to pay attention to you. They might tell you to call AT&T and to speak to them but in my case that was just a huge frustration cause I wasn't an AT&T customer and this phone was bought used. They told me literally "WE HAVE NO WAY TO HELP YOU". So, just avoid the hassle. If the Apple advisor wants you to speak to AT&T ask him to transfer you, have him explain the problem to AT&T's unlock department (they are the only ones who get access to this people) and ask him to please stay with  you throughout the conversation. That's the only way I got some help... and even like that I don't even know what will end up happening. I will let you know.. Let me hear on how are things going on your side.