moviel m1002 invalid sim

hello i am trying to unlock the model above but it showing invalid sim and i perform remove simlock but nothing changes, is it is because is it doesnot display input unlock code


EXE: NckDongle Spreadtrum Module 0.7
SELECTED : SC6531
ACTION: Unlock.
SCENARIO: SC6531.
Detected: SPRD U2S Diag (COM16)
Sending loader, keep boot key untill loader start.
Loader OK: nckTeam(2016) Beta 0.3
CPU: 6531
FlashId: GigaDevice: [0x400000]GD25LQ32B
Reading Flash Info, wait...
Flash Size: $400000 Sector Size: $8000
NVRAM Status: NV_MINVALID_SOK
Checking nvram, wait....
Using mode 2
Writing simlock, wait...
Write Done.
Backup saved: backup\spd_nvram_backup\SC6531_3561580819xxxxx_sav ed_nv__1.bin
Total Time: 00:00:16
Done.