I customized my carrier logo by copying a .png in my carrier bundles folder As Default_CARRIER_ATT along with the FSO but it still is not working. I read a post that someone previous apps messed with the settings but the only app I dled was customize which does not work anymore if this can redirect the setting in any way please let me know thanks
Make sure in your themes directory you have your logos in a "com.apple.ATT_US" folder, with that in a "Bundles" folder, with that in your "theme name" folder.
If it still won't go, grab Make it Mine from Cydia launch it and hit the carrier button to replace your current carrier with the one you want. Remember to the the carrier name feild blank in make it mine, I use it all the time for this crap.