| i had same problem
Searching for SAMSUNG Mobile USB Modem...OK
SAMSUNG USB Modem detected on [COM526]
Looking for DEVICE...OK
Reading USB MODEM information...OK
MODEL : SM-J600G
VER : J600GDXU3ARL1/J600GODM3ARK4/J600GDXU3ARJ8/J600GDXU3ARL1
IMEI : 359431091527766
S/N : RZ8M11VXSH
U/N : CCK00F163B47B75
Loading ADB module..OK
Starting ADB module...OK
Searching for SAMSUNG ADB device...OK
Checking device authorization...OK
Reading ADB device information...
ADB Serial Number : 3200F163B47B75CB
SIM State : ABSENT (OK)
Debug Level : OK
CP Version : J600GDXU3ARJ8
Android Version : 8.0.0
Warranty VOID : 0
Loading RIL applet...OK
Starting RIL applet...OK
Reading RADIO information...
IMEI : 359431091527766
Initializing RIL applet....OK
Starting exploit...[SHL:OK]...OK
Reading HW signature...FAIL(ack)
Failed when USB setting on *#0808# DM+ACM+ADB |