Deleting system files I've been trying for a few weeks to root my android device. I'm running a ZTE Whirl 2 (Z667G) and none of the 25 one-click root programs have worked on it. I've given up on that path.

So I started researching rooting with ADB but I've had so many different problems there. Here are all the different methods I've tried, and their error messages:

psneuter: 'Failed to set prot mask: inappropriate ioctl for device'

zergRush: does nothing at all

adb root: 'adbd cannot run as root in production builds'

adb remount: 'remount failed: operation not permitted'

mount -o remount,rw /system: 'mount: operation not permitted'

All I'm trying to do here is remove the useless system apps from /system/app. I'd like to root my phone but the main reason I'm doing so is to get that crap off my device. Thanks in advance to anyone who can help me!
PSNeuter and ZergRush are too old-school (2.3.x-era), no wonder why they won't work.

This is a very unpopular phone so it doesn't have a custom recovery either. If the one-clickers (usually comes with the latest exploits) won't work then you're out of luck for now.