Unlock done model samsung at@t i747.

PROCCEDURE.......

1. Disconnect USB cable from phone.
2. Go to Menu->Settings->Applications->Development.
3. Turn on "USB Debugging" option.
4. When message is appear press "Yes".
5. Go to dial window.
6. Enter "*#7284#" number.
7. Set "UART" radio button to "MODEM" value.
8. Go to "Qualcomm USB Settings".
9. Select "DM+Modem+ADB".
10. Close window.
11. Go to dial window.
12. Enter "*#9090#" number.
13. Set "Diag config" to "USB" value.
14. Restart phone.
15. Press "Read Info" in software...