"The sim card inserted in this iphone does not appear to be supported" Even with AT&T

[h4lp m3]

Problem:
I just restored to 4.3.3 in iTunes via redsn0w "pwnd DFU" mode.
Then I jailbroke it and now it says "The sim card inserted in this iphone does not appear to be supported" I'm just confused. I can't seem to activate this iPhone and get it off the iTunes screen.

Things I've tried:
I have tried multiple SIM cards, even AT&T SIM cards that work fine in other iPhone 4's.
I've tried different SIM card trays, different cables, mac and PC.

Anyone ever heard of this?​

 

[Crystal-RX]

did you buy it from Apple/AT&T stores in the US? if not, it might be brought here from oversea and therefore, it was locked to another network and not AT&T.

Did you try Redsn0w to hactivate it?

 

[Applejuiced]

Yep, if its not activating with an AT&T sim then good luck finding the GSM carrier its locked to.

 

[h4lp m3]

did you buy it from Apple/AT&T stores in the US? if not, it might be brought here from oversea and therefore, it was locked to another network and not AT&T.

Did you try Redsn0w to hactivate it?

It's from Canada and I don't see any option to hactivate in RedSn0w.
My options are:

• Install Cydia
• Install custom bundle
• Allow boot animation
• Enable miltitask gestures
• Just boot tethered right now
• Just enter pwned DFU mode right now

 

[Applejuiced]

Once u jb with redsnow it will automaticly hactivate it for you.
There's no option to select. Just install cydia.