Please don't use the term brick so loosely.
Brick means what it implies your device is no better than a brick as in a paper weight to hold your paper from flying off. No Lights, no Screen, no response what so ever.
If you look at this
and scroll down just a little bit you will see
"WiFi not working properly?
Fix #1 >> http://bit.ly/gAqDAe
Fix #2 (WPA from v8.0 - No-Adhoc) >> http://bit.ly/darky-wpa-80
Wikipedia states that the GT I9000T is the Mexican Variant exclusive to TelCel.
I am not sure what the exact difference is but I believe your problem has got to do with CSC.
Your best option is to get it reflashed by your carrier under warranty. Your Carrier's ROM will be hard to find out in the wild.