LG K371 Android 7.0 Unlock

Hello, Z3X team!
I have LG K371 locked by AT&T.
LG Tool gives me positive result but after all I receive NET code request on the phone screen.
I read in Octopus section that they write qcn (QCN K371_354885071110387_19-07-2017_10-43-16.qcn )
"
1.Reset Security operation.
2 Write "QCN K371_354885071110387_19-07-2017_10-43-16.qcn" file
"
But I do not have octopus. I want to unlock it using Z3X.
Can you help?

Logs:

26-Feb-18 11:56:23: Mode: Normal
26-Feb-18 11:56:23: Model: LGK371AT
26-Feb-18 11:56:23: Build version: Nov 15 201718:44:13Jul 12 201723:00:00LGK371AT
26-Feb-18 11:56:23: SW Version: MPSS.JO.2.0.c1.2-00020-8909_GEN_PACK-1.90266.1.93441.1.106743.1
26-Feb-18 11:56:23: IMEI: 35488507190098-5
26-Feb-18 11:56:23: BlueTooth Address: 00:00:00:00:00:00
26-Feb-18 11:56:23: Phone Code:
26-Feb-18 11:56:23: SPC: 000000
26-Feb-18 11:56:23: Elapsed: 1 secs. --> (v9.44)
26-Feb-18 11:56:23:
26-Feb-18 11:56:29: Mode: Normal
26-Feb-18 11:56:29: Model: LGK371AT
26-Feb-18 11:56:29: Build version: Nov 15 201718:44:13Jul 12 201723:00:00LGK371AT
26-Feb-18 11:56:29: SW Version: MPSS.JO.2.0.c1.2-00020-8909_GEN_PACK-1.90266.1.93441.1.106743.1
26-Feb-18 11:56:29: IMEI: 35488507190098-5
26-Feb-18 11:56:29: BlueTooth Address: 00:00:00:00:00:06
26-Feb-18 11:56:29: Phone Code:
26-Feb-18 11:56:29: SPC: 000000
26-Feb-18 11:56:29: Elapsed: 1 secs. --> (v9.44)
26-Feb-18 11:56:29:
26-Feb-18 11:56:36: Direct unlock
26-Feb-18 11:56:36: Working with security zone
26-Feb-18 11:56:36: Checking phone at
26-Feb-18 11:56:36: COM217
26-Feb-18 11:57:10: Reboot phone
26-Feb-18 11:57:47: Phone detected!
26-Feb-18 11:57:47: Repair IMEI...
26-Feb-18 11:57:47: Search LG Modem port...
26-Feb-18 11:57:47: Detected LG Modem port at COM218
26-Feb-18 11:57:47: Reboot phone
26-Feb-18 11:57:47: Done
26-Feb-18 11:57:47: Elapsed: 72 secs. --> (v9.44)
26-Feb-18 11:57:47: