Lg h871 at&t unlock fail

LG H871 AT&T UNLOCK FAIL NOW IMEI 0

Checking data...OK
Platform: LG Qualcomm
Selected port: COM26
Selected model: H871
Reading info...
Model ID: LG-H871
IMEI: 355470-*********
Android version: 8.0.0
Battery level: 47%
Mode: Normal
Firmware compiled date: Sep 02 2018
Firmware compiled time: 22:00:00
Firmware released date: Nov 13 2018
Firmware released time: 14:19:29
SW Version: MPSS.TH.2.0.1.c3.1-00028-M8996FAAAANAZM-
1.159787.1.167449.1
IMEI: 355470-*********
Bluetooth address: 88:36:5F:63:FB:3F
Wi-Fi MAC address: 10:F1:F2:0B:EA:8B
SPC: 000000
Unlocking...
Write security backup function doesn't work for this device with latest
firmware versions. If you'll encounter any problem during Unlock operation -
you won't be able to restore the phone to it's initial state, so proceed at your
own risk.

Continue?
Reading QCN...
Send SPC...OK
Reading Mobile Property...OK
Reading Feature Mask...OK
Reading Roaming List 0...OK
Reading NV_Numbered Items...OK
Reading NV_Numbered SIM1 Items...OK
Reading NV_Numbered SIM2 Items...OK
Reading NV Items...OK
Reading EFS...OK
Reading Provisioning Items...OK
Reading QCN done!
Backup saved to "H871_355470*******_16-02-2019_19-07-32.qcn"
Switching to Download mode...OK
Initializing flash...OK
Reading partitions...OK
Reading security area...OK
Backup saved to "H871_355470********_16-02-2019_19-19-31.SEC"
Writing security area...OK
Switching to Normal mode...
Found model LGH871AT* ÿh at port COM26
Send SPC...OK
Writing QCN...
Writing NV_Numbered Items...Failed!
Performed by 2.9.2 Software version.