G955F 9.0 unlock error ?

DIAG read

Code:

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Operation: Read Codes via Server
Selected model: SM-G955F
Software version: 37.0

Checking Login and Password... OK
Ballance: xx crd.
You have xx credit(s) left. This operation takes 5 credits.Continue?  Yes
Searching Samsung modem... detected COM25
Reading phone info...
Model: SM-G955F
AP version: G955FXXU5DSFB
CSC version: G955FEVR5DSF1
CP version: G955FXXU5DSFB
Product code: EVR
Phone SN: R5xxxxxxxLB
IMEI: 3543xxxxxxxxx75
Unique number: CExxxxxxxxxxxxx03
Searching Samsung diag port... detected COM26
Reading phone info... OK
CP version: G955FXXU5DSFB
CP build: Jun 26 2019 06:59:41
Reading data from phone... error (1)
Searching server... OK
Checking available files... not found compatible file
Try downgrade modem if possible

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NEW read

Code:

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Operation: Read Codes via Server
Selected model: SM-G955F
Software version: 37.0

Checking Login and Password... OK
Ballance: xx crd.
You have xx credit(s) left. This operation takes 5 credits.Continue?  Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G955F
Android version: 9
PDA version: G955FXXU5DSFB
CSC version: G955FEVR5DSF1
Phone version: G955FXXU5DSFB
Product code: SM-G955FZKAEVR
CSC country code: UK
CSC sales code: EVR
Phone SN: R5xxxxxxxxxxB
IMEI: 354xxxxxxxxxxxxx5
HW version: MP 0.501
RF cal date: 20170412
Chip name: EXYNOS8895
Modem board: SHANNON355
Security patch: 2019-07-01
Boot Warranty bit: 0
SIM State: ABSENT
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching server... OK
Checking server answer... modem not supported
Searching server... OK
Checking available files... not found compatible file
Try downgrade modem if possible

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how to read unlock codes w/o data lose ?