ZTE-Z990 Avail HowTo's - ZTE Blade / Libra - Blade.MoDaCo.com - MoDaCo I found and followed this guide to unlock my Avail. It worked; I tested it with a T-Mobile SIM Card, and successfully placed a call. I then set up my phone with a new T-Mobile SIM card that I purchased, called T-Mobile to get the data settings, and now everything works perfectly. No more AT&T. Happy, happy day! As a heads-up, this process will essentially put you back at a stock ROM. No Kernel1.0, no Clockwork Mod Recovery, and you will need to reroot the phone. Take your time after entering the *983*7668# dev code for the temporary root unlock. I kept getting an error message when I tried that step, because I was going too fast. Make sure to wait at least 10 seconds before trying to do the create /data/local.prop step of anthony's rooting method.