ALL of these are invalid!!

[Zero-Faces]

None of these will work on a frp locked device, adb shell does not respond to request and refuses connections. so how did you frp unlock a device ????

[chipmunkmc]

Some devices let you enable USB Debugging under Setup Wizard conditions. Of course, you will need separate exploits to open the Settings app, but this is still useful for those devices nonetheless. These commands should also work if you manage to obtain root access (via exploits) and use a terminal emulator app to run them in a root shell, but I have not tested that myself.

[SatinSnow]

My device won't seem to show up and the I have all the correct drivers for my device and the usb driver. I've been trying to frp bypass a samsung device a using adb and using your method I can't get past this error so far
"no devices/emulators found" (so my device isn't being found).
The other method (which I've found on here - Samsung-FRP-Bypass) I've been using I end up with this
* daemon not running; starting now at tcp:5037
* daemon started successfully
Any help? Or have any questions I may be able to answer?