I am trying to install a custom carrier logo and so far have been unsuccessful. What's confusing me is that I replaced the default carrier logo in /System/Library/Carrier Bundles/ATT_US.bundle with my own but yet the default "AT&T" text logo is still being displayed. I had previously used MIM to change my carrier logo and had to manually type in "AT&T" to get the logo back to default (leaving the field blank and hitting "carrier" did not restore the default carrier logo as the application stated it would). Is it possible that MIM created a fake carrier logo that is still installed and needs to be manually deleted? Any help or insight would be greatly appreciated.