D851 IMEI repair Error


——————————————————————————–
Platform: LG Qualcomm
Selected port: COM132
Selected model: D851
Reading info…
Model ID: LG-D851
IMEI: 014088-00-131553-9
Android version: 5.0.1
Battery level: 50%
Mode: Normal
Firmware compiled date: Jan 05 2015
Firmware compiled time: 01:00:00
Firmware released date: Aug 15 2015
Firmware released time: 15:37:17
SW Version: MPSS.DI.2.0.1.c1.13-00053-M8974AAAAANPZM-1
IMEI: 014088-00-131553-9
SPC: 000000
——————————————————————————–
Checking data…OK
Platform: LG Qualcomm
Selected port: COM132
Selected model: D851
Reading info…
Model ID: LG-D851
IMEI: 014088-00-131553-9
Android version: 5.0.1
Battery level: 50%
Mode: Normal
Firmware compiled date: Jan 05 2015
Firmware compiled time: 01:00:00
Firmware released date: Aug 15 2015
Firmware released time: 15:37:17
SW Version: MPSS.DI.2.0.1.c1.13-00053-M8974AAAAANPZM-1
IMEI: 014088-00-131553-9
SPC: 000000
Fixing IMEI…
New IMEI: 014081-10-131553-3
Skip Read/Write QCN
Writing security area…OK
Rebooting phone…
Found model D85120g at port COM132
Error code: Z1AL3CAS2Q

—–

I tried many times. get stuck on "Error code: Z1AL3CAS2Q" and stops.
IMEi becomes 0, i have restored QCN and imei comes back.

I do have SEC and QCN backup. phone is currently working, but need IMEI repaired.

Team: can you shed some light on that that error code means?