I try to unlock lg h831 but it make invalid imei and give error at end of unlock process any way to revive it imei .
Checking data...OK
Platform: LG Qualcomm
Selected port: COM24
Selected model: H831
Reading info...
Model ID: LG-H831
IMEI: 357743-0++++++++
Android version: 8.0.0
Battery level: 21%
Mode: Normal
Firmware compiled date: Aug 08 2018
Firmware compiled time: 22:00:00
Firmware released date: Aug 17 2018
Firmware released time: 16:24:46
SW Version: MPSS.TH.2.0.c1.4-00070-M8996FAAAANAZM-
1.161091.1.163432.2
IMEI: 357743-07-777470-5
Bluetooth address: 88:36:5F:18:CB:7D
Wi-Fi MAC address: 88:36:5F:B4:7D:46
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 "H831_3577430++++++++_20-07-2020_18-48-
29.qcn"
Switching to Download mode...OK
Initializing flash...OK
Reading partitions...OK
Reading security area...OK
Backup saved to "H831_3577430++++++++_20-07-2020_19-00-
09.SEC"
Writing security area...OK
Switching to Normal mode...
Found model LGH831AT* ÿh Gè at port COM24
Send SPC...OK
Writing QCN...
Writing NV_Numbered Items...Failed!
Error code: ZXLCALSZXD
Performed by 3.0.2 Software version.