I did a little experiment yesterday in the hopes that maybe I can help the guys who bricked their phones.
I've installed a Windows XP box from scratch, "bricked" my phone, so it would go into a bootloop, and started to experiment with various fixes.
So, first of all, a clean install of Win XP is handy. Or a not so clean install, just make sure, that there are no ZTE drivers installed. Set up ADB.
Install Join Me, I linked the version that came with my U960 in an earlier post.
After it is installed, do a reboot, just to make sure everything is all right.
Remove the battery, wait a bit, then replace the battery.
Hold the "volume down" key, and then press the power button, and only release it when the phone vibrates. It should take 8-10 seconds. After this, just release the volume down key.
Now the phone should be in fastboot mode, or FTM mode, it's the same.
The screen is blank in this mode, but if we connect it to the computer, a single new device should pop up, the "Android Sooner Single ADB interface". The driver automatically installs, at least for me, if not, try to force the driver install, but usually it is unnecesary.
At this point, it is possible to flash a working recovery, and if we have a working recovery, then we are golden, we can do anything. Use catty's new recovery for example, extract the recovery.img from the zip, and put it to the platform-tools folder, then flash it using "fastboot flash recovery recovery.img" command.
It just takes a bit of patience to put the phone into fastboot mode, just experiment with it.
Oh, and just for the record, when I received my U960, I successfully bricked it on the very first day. It had B03 installed, and that build has a problem with the recovery, so I could not enter the recovery mode, and had to fix the phone this way that I've described. But first I screwed around for a good 5-6 hours trying to fix it until I realized that the phone has a fastboot mode.^^