Just want to bump this. I'm still stucked.
I'm using ZTE V9. I was able to run "adb". I have no "fastboot" command but I can go to that "fastboot" screen by pressing power and volume down (-). I can't do anything on that screen using the device even via command line. I can't execute "fastboot -w reboot" so I just execute "adb reboot recovery". A menu was shown but I can't click on it. I can scroll using volume keys but that's it. (Was pissed with that). I tried power and volume key combinations but nothing happened. I reboot again and issued "adb reboot -w" to wipe/factory reset but it's still the same.
Nothing much information about ZTE V9. I found below site but it says that I need my phone rooted and using "fastboot". I'm downloading Android SDK now plus JDK (another requirement). My internet is really slow right now so this extra installation is taking me time.
[RECOVERY] : ClockworkMod Recovery for ZTE V9 Tablet - Android @ MoDaCo
Is it really possible to perform factory reset using ADB?
Hope you guys can help.