is there a way i can extract my ipcc file. for some reason i dont know which ipcc file worked for me. i have downloaded tons of these file and really.... really dont jnow which one worked for me? right now the one on my personal phone works and i have the tethering option and MMS working.
Use software like iPhoneBrowser to copy /System/Library/Carrier Bundles/ATT_US.bundle to your PC, put it in a folder called Payload, zip Payload up, and rename .zip to .ipcc .