g925w8 no baseband

i receive g925w8 no baseband version 7.0 i try to write certificate write efs and nv file same error i also try Samsung Tool PRO v.30.1

Waiting ADB device... OK
Reading phone info...
Model: SM-G925W8
Android version: 6.0.1:confused:
Product code:
Phone version:
PDA version: G925W8VLU4CPG5
CSC version: G925W8OYA4CPG5
CSC country code: Canada
CSC sales code: FMC
HW version:
Phone SN: R58G50DECRZ
Chip name: EXYNOS7420
Modem board:
Security patch: 2016-07-01
RF cal date:
IMEI:
Checking Super user right... true
Reading NV data... OK
Checking NV data... OK
Reading data... OK
Detecting MODEM... OK
Reading MODEM... OK
Calculating... error (0 6)
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data from phone... error (0)
Try downgrade modem if possible
Done with Samsung Tool PRO v.29.7