Here is how carrier free charge tethering looks and is done with Orange Romania
rename ~/Library/iTunes/iPhone Carrier Support/Orange_ro.ipcc to Orange_ro.zip extract and enter Payload and bundle dirs , open Carrier.plist
edit the apns section like in the screenshot , optionally edit the other 2 plists changing BundleVersion from 2.5 to 5.0, save and close all plists
compress the Payload dir an rename the archive to .ipcc , alt+click Restore in itunes and select it after typing
defaults write com.apple.iTunes carrier-testing -bool TRUE
in terminal then just reboot the iphone
i have tested both usb and bluetooth , working great , the ipcc file is atached
- Title: Orange_ro
File: Orange_ro.ipcc
Size: 29 kB