AT&T I727 (4.0.4) Unlock Successful by rooting and using USB cable

[..::..DynafiX::..]

Cable: USB

Z3X Software Version 13.8
OS version of the phone 4.0.4

Enable USB Debugging on the phone

*#7284#
Set the first option to MODEM
Set the second option to MODEM

*#9090#

Set it to USB

1. Install a custom recovery and root the phone, follow this guide by vincom, he has made the rooting and custom recovery installation process a breeze, it'll take you 10mins or less to root the phone.

(ROOT IS NECESSARY / MANDATORY)

[HOWTO] NEWB GUIDES To: | RESTORE TO STOCK | USE ODIN | INSTALL CWM/TWRP | ROOT | - xda-developers

2. Use Z3X to read codes

Here is the log of the operation

-------------------------------------------------------------------------------------

Selected model: I727
Selected port:
Selected port speed: 115200
Port not selected
Done with Samsung Tool v.13.8

Selected model: I727
Selected port: COM21 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info... no answer from phone
Done with Samsung Tool v.13.8

Selected model: I727
Selected port: COM23 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info...
Build: M8260A-AABQOCZM-3.0.552067T
Done with Samsung Tool v.13.8

Selected model: I727
Selected port: COM23 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info...
Build: M8260A-AABQOCZM-3.0.552067T
Reading security... error access denied
Done with Samsung Tool v.13.8

Selected model: I727
Selected port: COM23 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info...
Build: M8260A-AABQOCZM-3.0.552067T
Reading security... error access denied
Done with Samsung Tool v.13.8

Selected model: I727
Selected port: COM21 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info...
PDA/CSC version: I727UCLI3/I727ATTLI3
Phone version: SW VERSION :None
Phone HW: REV0.2
Cal date: 2012.07.06
IMEI: 35990304216463
Phone S/N: R21C70Q3ZX
Build: M9200B-SCAQCSZD-3.4.701084
Reading security... OK
Searching server... error ()
Done with Samsung Tool v.13.8

Selected model: I727
Selected port: COM21 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info...
PDA/CSC version: I727UCLI3/I727ATTLI3
Phone version: SW VERSION :None
Phone HW: REV0.2
Cal date: 2012.07.06
IMEI: 3599------------
Phone S/N: R21C7------
Build: M9200B-SCAQCSZD-3.4.701084
Reading security... OK
Searching server... OK
NET lock: #7465625*638*13146316#
Sub lock: #7465625*782*00000000#
SP lock: #7465625*77*00000000#
CP lock: #7465625*27*00000000#
For check lock status: *#7465625#
Done with Samsung Tool v.13.8