Sent from my SGH-T889 using xda app-developers app
Modems are what give you voice and data service for your carrier such as T-mobile.
There is a list in one of these threads that tells you which roms for other carriers are safe to flash on the T889. When you find it, make sure you follow the directions to the letter or you will end up with an expensive paper weight.
Sent from my wickedly awesome Galaxy Note 2 using my fingers. Duh!!!