A text message ?
Are you serious...Is that even believable ???
There are plenty of ways to "brick" your phone best thing I can say is follow all instructions word for word keep reading on it and you won't have to worry about bricking it. Something to keep in mind is never pull the battery during a update/upgrade...and make sure you are fully rooted before attempting to flash..
Also I might add that as long as you can get into bootloader you are never considered brick...
If for say some reason you end up loading a ROM and get stuck in a bootloop which is the boot up animation playing over and over...Don't worry your still not bricked read through the forums here and xda...