8 + 8 = 16 Credits to unlock G975F ?

[gsm_unlock2]

Hi.

I need to pay 16 credits to G975F?
Could you inform before?
I spend 8 credits for the MCK and only then do I know that I have to spend 8 more for the NCK. Please inform in advance, I will pass the cost to my client based on 8 credits and not double.

 Operation: Read Codes via Server [UPLOAD Mar 2021]
 Selected model: SM-G975F
 Software version: 42.10
 
 Checking Login and Password... OK
 Ballance: 32 crd.
 You have 32 credit(s) left. This operation takes 8 credits.Continue?  Yes
 Waiting ADB device... OK
 Reading phone info...
 Model: SM-G975F
 Android version: 10
 PDA version: G975FXXS9DTK9
 CSC version: G975FOBE9DTI8
 Phone version: G975FXXS9DTK9
 Product code: SM-G975FZKDEVR
 CSC country code: UK
 CSC sales code: EVR
 Carrier ID: EVR
 Phone SN: RF8MA17QFSK
 IMEI: 356171102xxxxxx
 HW version: MP 0.700
 RF cal date: 20191009
 Chip name: EXYNOS9820
 Modem board: SHANNON5000
 Security patch: 2020-12-01
 Boot Warranty bit: 0
 SIM State: NETWORK_LOCKED,ABSENT
 Searching Samsung modem... detected COM21
 Initialization zTool Loader... OK
 Running zTool, please wait... OK
 Loading... OK
 Initialization zTool... OK
 Running zTool, please wait... OK
 Executing... OK
 Searching Ramdump interface... COM6 detected
 Rebooting phone... OK
 Waiting ADB device... OK
 Waiting for device to become ready... OK
 Reading ramdump data from phone... OK
 Calculating... OK
 Searching server... OK
 Waiting for server answer... OK
 Freeze code (MCK):  57060618
 To read NET Lock Code(NCK), please insert SIM Card and enter MCK code, then read the codes again.
 
 Operation: Read Codes via Server [UPLOAD Mar 2021]
 Selected model: SM-G975F
 Software version: 42.10
 
 Checking Login and Password... OK
 Ballance: 24 crd.
 You have 24 credit(s) left. This operation takes 8 credits.Continue?  Yes
 Waiting ADB device... OK
 Reading phone info...
 Model: SM-G975F
 Android version: 10
 PDA version: G975FXXS9DTK9
 CSC version: G975FOBE9DTI8
 Phone version: G975FXXS9DTK9
 Product code: SM-G975FZKDEVR
 CSC country code: UK
 CSC sales code: EVR
 Carrier ID: EVR
 Phone SN: RF8MA17QFSK
 IMEI: 356171102xxxxxx
 HW version: MP 0.700
 RF cal date: 20191009
 Chip name: EXYNOS9820
 Modem board: SHANNON5000
 Security patch: 2020-12-01
 Boot Warranty bit: 0
 SIM State: NETWORK_LOCKED,ABSENT
 Searching Samsung modem... detected COM21
 Initialization zTool Loader... OK
 Running zTool, please wait... OK
 Loading... OK
 Initialization zTool... OK
 Running zTool, please wait... OK
 Executing... OK
 Searching Ramdump interface... COM6 detected
 Rebooting phone... OK
 Waiting ADB device... OK
 Waiting for device to become ready... OK
 Reading ramdump data from phone... OK
 Calculating... OK
 Searching server... OK
 Waiting for server answer... OK
 Network code (NCK): 13149396

[IMEI_info]

You use the march 2021 upload solution and your phone got a 12-2020 security patch why not use the older method(diag January 2021) and unlock your device just for 8credits?