LG M150 after unlock i lost imei after try repair other tools phone lock again

hi dear team z3x after try to unlock this lg M150 i lost imei after try repair with z3x he say cannot support i use other tools restore nvitem phone relock but other tools fix imei z3x can reunlock for me by server i want to know why need take other credits to unlock again in this case i lost unlock or need unlock by 5 credits again after fix imei by other tools.

11/26/2018 11:24:33 PM: Phone detected!
11/26/2018 11:24:33 PM: Read security zone...
11/26/2018 11:24:33 PM: Laf Protocol: 01000005
11/26/2018 11:24:34 PM: Model name: LG-M150
11/26/2018 11:24:34 PM: Software verion: M15020m
11/26/2018 11:24:34 PM: Android verion: 7.0
11/26/2018 11:24:34 PM: Target operator: ATT
11/26/2018 11:24:34 PM: Target country: US
11/26/2018 11:24:34 PM: Chipset: msm8909
11/26/2018 11:24:34 PM: IMEI: 000000000000000
11/26/2018 11:24:45 PM: Save part1...
11/26/2018 11:24:45 PM: done
11/26/2018 11:24:45 PM: Save part2...
11/26/2018 11:24:45 PM: done
11/26/2018 11:24:46 PM: Save part3...
11/26/2018 11:24:46 PM: done
11/26/2018 11:24:46 PM: Sec zone saved: ..\Backup\M150_000000000000000_26112018_232444.lgs b1
11/26/2018 11:24:46 PM: Detecting write method...
11/26/2018 11:24:46 PM: Init write method...
11/26/2018 11:24:47 PM: fail
11/26/2018 11:24:47 PM: Init misc method...
11/26/2018 11:24:50 PM: fail
11/26/2018 11:24:50 PM: Init sign method...
11/26/2018 11:24:50 PM: Execute sign method...
11/26/2018 11:24:52 PM: done
11/26/2018 11:24:52 PM: Checking sign method...
11/26/2018 11:25:04 PM: done
11/26/2018 11:25:41 PM: Reboot...
11/26/2018 11:26:39 PM: Phone detected!
11/26/2018 11:26:39 PM: Reading QCN file...
11/26/2018 11:26:39 PM: OK
11/26/2018 11:26:39 PM: Checking phone at
11/26/2018 11:26:39 PM: COM34
11/26/2018 11:26:39 PM: Detected ID:
11/26/2018 11:26:39 PM: 0000100C (MSM8909)
11/26/2018 11:26:39 PM: SW Version:
11/26/2018 11:26:39 PM: MPSS.JO.2.0.c1.2-00020-8909_GEN_PACK-1.92496.1.104247.1
11/26/2018 11:26:39 PM: Read SPC...
11/26/2018 11:26:39 PM: SPC: 000000
11/26/2018 11:26:39 PM: Unlock SPC...
11/26/2018 11:26:39 PM: OK
11/26/2018 11:26:39 PM: Checking paths...
11/26/2018 11:26:39 PM: OK
11/26/2018 11:26:39 PM: Restoring EFS Backup...
11/26/2018 11:26:54 PM: OK
11/26/2018 11:26:54 PM: Restoring NV Items...
11/26/2018 11:27:04 PM: OK
11/26/2018 11:27:04 PM: Restoring NV Item SIM1...
11/26/2018 11:27:04 PM: OK
11/26/2018 11:27:04 PM: Restoring NV Item SIM2...
11/26/2018 11:27:04 PM: OK
11/26/2018 11:27:04 PM: Restoring Provisioning Item Files...
11/26/2018 11:27:10 PM: OK
11/26/2018 11:27:10 PM: Search LG Modem port...
11/26/2018 11:27:10 PM: Detected LG Modem port at COM35
11/26/2018 11:27:10 PM: Read data from phone...
11/26/2018 11:27:11 PM: Check adb server status...
11/26/2018 11:27:11 PM: OK
11/26/2018 11:27:12 PM: Checking adb...
11/26/2018 11:27:12 PM: SW Version: M15020m
11/26/2018 11:27:12 PM: Searching server...
11/26/2018 11:27:16 PM: Waiting for server answer...
11/26/2018 11:27:19 PM: Unlock done!
11/26/2018 11:27:19 PM: Elapsed: 381 secs. --> (v9.58)