g925w8 unlock error 7.7.8
 

Waiting ADB device... OK
Reading phone info...
Model: SM-G925W8
Android version: 5.1.1
Product code: SM-G925WZWABMC
Phone version: G925W8VLU3BOK1
PDA version: G925W8VLU3BOK1
CSC version: G925W8OYA3BOK1
CSC country code: Canada
CSC sales code: BMC
HW version: REV0.1
Phone S/N: R58G31QRECB
Modem board: SHANNON333
RF cal date: 20150324
IMEI:
Checking Super user right... true
Initializating zTool... OK
Running zTool, please wait... error (7.7.8)
Done with Samsung Tool PRO v.23.9

Select Model 925f and give the phone unlock

tried your method but same result.same error........

Same with G928F
[ 07/01/2016 13:59:00 ] Operation: Read CERT
[ 07/01/2016 13:59:00 ] Selected model: SM-G928F
[ 07/01/2016 13:59:00 ] Software version: 23.9
[ 07/01/2016 13:59:00 ]
[ 07/01/2016 13:59:00 ] Waiting ADB device... OK
[ 07/01/2016 13:59:00 ] Reading phone info...
[ 07/01/2016 13:59:00 ] Model: SM-G928F
[ 07/01/2016 13:59:00 ] Android version: 5.1.1
[ 07/01/2016 13:59:00 ] Product code: SM-G928FZDAVIA
[ 07/01/2016 13:59:00 ] Phone version: G928FXXS2AOK3
[ 07/01/2016 13:59:00 ] PDA version: G928FXXS2AOK9
[ 07/01/2016 13:59:00 ] CSC version: G928FTEF2AOJ1
[ 07/01/2016 13:59:00 ] CSC country code: Germany
[ 07/01/2016 13:59:00 ] CSC sales code: VIA
[ 07/01/2016 13:59:00 ] HW version: MP 0.500
[ 07/01/2016 13:59:00 ] Phone S/N: RF8H106DRTM
[ 07/01/2016 13:59:00 ] Modem board: SHANNON333
[ 07/01/2016 13:59:00 ] RF cal date: 20160105
[ 07/01/2016 13:59:00 ] IMEI:
[ 07/01/2016 13:59:00 ] Checking Super user right... true
[ 07/01/2016 13:59:00 ] Initializating zTool... OK
[ 07/01/2016 13:59:00 ] Running zTool, please wait... error (7.7.8)
[ 07/01/2016 13:59:00 ]
[ 07/01/2016 13:59:00 ] Operation: Read CERT
[ 07/01/2016 13:59:00 ] Selected model: SM-G928F
[ 07/01/2016 13:59:00 ] Software version: 23.9
[ 07/01/2016 13:59:00 ]
[ 07/01/2016 13:59:00 ] Waiting ADB device... OK
[ 07/01/2016 13:59:00 ] Reading phone info...
[ 07/01/2016 13:59:00 ] Model: SM-G928F
[ 07/01/2016 13:59:00 ] Android version: 5.1.1
[ 07/01/2016 13:59:00 ] Product code: SM-G928FZDAVIA
[ 07/01/2016 14:00:00 ] Phone version: G928FXXS2AOK3
[ 07/01/2016 14:00:00 ] PDA version: G928FXXS2AOK9
[ 07/01/2016 14:00:00 ] CSC version: G928FTEF2AOJ1
[ 07/01/2016 14:00:00 ] CSC country code: Germany
[ 07/01/2016 14:00:00 ] CSC sales code: VIA
[ 07/01/2016 14:00:00 ] HW version: MP 0.500
[ 07/01/2016 14:00:00 ] Phone S/N: RF8H106DRTM
[ 07/01/2016 14:00:00 ] Modem board: SHANNON333
[ 07/01/2016 14:00:00 ] RF cal date: 20160105
[ 07/01/2016 14:00:00 ] IMEI:
[ 07/01/2016 14:00:00 ] Checking Super user right... true
[ 07/01/2016 14:00:00 ] Initializating zTool... OK
[ 07/01/2016 14:00:00 ] Running zTool, please wait... error (7.7.8)
[ 07/01/2016 14:00:00 ]

New security not supported.

yes downgrade modem its too simple many times i talk about that.. new type security Mr Blang Sleeping on z3x.. Gcpro key can kill this ***

how to downgrade its modem and is it risky too?

Done with Samsung Tool PRO v.24.0


Waiting ADB device... Ok
Reading phone info...
Model: SM-G925W8
Android version: 5.1.1
Product code: SM-G925WZWABMC
Phone version: G925W8VLU3BOK1
PDA version: G925W8VLU3BOK1
CSC version: G925W8OYA3BOK1
CSC country code: Canada
CSC sales code: BMC
HW version: REV0.1
Phone S/N: R58G31QRECB
Modem board: SHANNON333
RF cal date: 20150324
IMEI:
Checking Super user right... true
Check version... OK
Initializating zTool... OK
Running zTool, please wait... OK
Reading nv data... OK
Checking NV data... OK
Calculating... OK
Writing nv data... OK
Rebooting phone... OK
Unlock done

Done with Samsung Tool PRO v.24.0