Install an app called Make It Mine!
Open MIM, and try typing in the letters ATT, go back to customize and try changing!
If ATT, try T-Mobile, if no luck try typing in your carriers name!
If that dosent work.
Unistall Customize (leave Customize Add ons!)
then
Install the customize app from
www.touchrepo.com/repo.xml(make sure its the IPOD one
Then shh into iphone and make sure the two files in Applications/Customize.app are changed:
From: Default_Carrier_ATT.png To Default_Carrier_IPOD.png
and FSO_Carrier_ATT.png To FSO_Carrier_IPOD.png
Then go to System/Library/CoreServices/Springboard.app
Do this
From: Default_Carrier_ATT.png To Default_Carrier_IPOD.png
Then you will have to use MIM and type in IPOD.
This will work!
and FSO_Carrier_ATT.png To FSO_Carrier_IPOD.png