I have trawled through this forum looking for help with creating my own vodafone logo but nothing really gave the answer but I did find little bits which helped.
After quite some time experimenting with various things I think I now have a solution - it worked for me anyway...
My little guide: -
Installing the carrier bundle
Connect to your iPhone with SFTP: Cyberduck (free) on a Mac or WinSCP (free) on Windows.
Goto to directory: /Systems/Library/Carrier Bundles/
(I'll try and get my bundle uploaded)
Copy the carrier bundle Vodafone_UK_custom.bundle from your PC/Mac into the directory on the iPhone.
A) If you are on an Apple supported carrier with a regular (non-iPhone) contract, you will need to locate the symlink for your carrier (looks like a folder) e.g. o2 UK symlink might be "23410", this should be renamed to "old_23410" (without quotes).
Disconnect and quit the SFTP application.
B) If you are using an unsupported carrier such as Vodafone UK, like me then you should first check here: [ame=http://en.wikipedia.org/wiki/Mobile_Network_Code]Mobile Network Code - Wikipedia, the free encyclopedia[/ame] for your supported SIM MCC/MNC number e.g. UK Vodafone MMC = 234, MNC = 15 so it reads 23415.
There is no need to disconnect at this point.
Creating the symlink
A) Open Terminal (Mac) or Putty (Windows) and connect to iPhone with SSH
type: ssh -l root 192.168.1.230 replacing 192.168.0.01 with your iPhones IP number, then type: cd /System/Library/Carrier\ Bundles and hit return.
After switching to the right directory create the symlink(s).
Type: ln -s Vodafone_UK_custom.bundle 23415 and hit return.
Quit the SSH session.
B) For an alternative method just use iFile (or Mobile Finder when it works on 3.0) to create the symlink;
if not already there navigate to the [ /System/Library/Carrier Bundles ] folder and create a new file with the name of your MMC/MNC number (i.e. 23415), set attribute type as "symlink" and the link target should be [ /System/Library/Carrier Bundles/Vodafone_UK_custom.bundle ].
Disconnect and quit the SFTP application/SSH session.
3. Shut down the iPhone and then restart it.
Enjoy your iphone, now with a custom carrier bundle.