Succes unlock A520F U7 
Code:
Operation: Read Codes via Server
Selected model: SM-A520F
Software version: 34.6
Checking Login and Password... OK
Ballance: 15 crd.
You have 15 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-A520F
Android version: 8.0.0
PDA version: A520FXXS7CRJ8
CSC version: A520FPHN7CRI1
Phone version: A520FXXU7CRH9
Product code: SM-A520FZKAPHN
CSC country code: The Netherlands
CSC sales code: PHN
Phone SN: R58xxx
IMEI: 357987xxxx
HW version: MP 0.401
RF cal date: 20180423
Chip name: EXYNOS7880
Modem board: SHANNON325
Security patch: 2018-10-01
Boot Warranty bit: 0
SIM State: NETWORK_LOCKED
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching server... OK
Checking server answer... OK
Executing... OK
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... OK
Freeze code: 13146257
NET lock: 95295930
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
SIM lock: 00000000
For check lock status: *#7465625#
Done with Samsung Tool PRO v.34.6