La misma Z3X nos da las instrcucciones :), las remarcare.-
UNLOCK INSTRUCTIONS:
Read codes only
USB cable :
1. Phone must be powered on.
2.
Type *#782872# to switch phone to Qualcomm USB mode, (after operations you can enter *#726872# to switch back to Samsung USB mode.)
3. Connect USB cable, install drivers.
4.
Select diagnostic port in port settings. 5.
Enter *#7465625# (phone must display locks status). 6. Press
'Read codes' to read security codes.
CitarOperation: Read Codes
Selected model: SGH-A847
Selected port: COM36 Qualcomm HS-USB Diagnostics 9002
Software version: 29.4
Reading phone info... OK
Model: SGH-A847
Country code: ¹Ì±¹/ATT
Cal date: 2010-04-26
Factory SW: UCJD6_H2
Unique number: 55160001329928
Memory phone: K5R2G1GACE(A847)S
Phone SN: RPBB260968
Reading IMEI... OK
IMEI: XXXXXXXXXX
Reading software version... OK
Phone version: A847UCJD6
Searching sysinfo... OK
Reading SYSINFO... OK
Please wait, calculating codes... OK (time - 00:00:12)
Freeze code: 50362939
NET lock: 40690829
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
Multi lock: 12369874
SIM lock: 12369874
For check lock status: *#7465625#
Done with Samsung Tool PRO v.29.4