If you were to search the forums for users who had some sort of modem trouble, you’d find quite a few questions. Typically, they come from users who have either flashed their modem incorrectly or simply flashed the wrong one. This can occur quite easily as not all modems are built equally, and there’s always someone who tries to flash a Verizon modem on an AT&T device.
Now, for T-Mobile Samsung Galaxy S III users, there’s a small AROMA script that takes the guesswork out of modem flashing. Developed by XDA Senior Member clark44, the application is called Team Sonic Modem Flasher. What it is designed to do is allow T-Mobile Galaxy S III owners—and only T-Mobile Samsung Galaxy S III owners—to change their radios without the guesswork. It uses the now popular AROMA installer and it’s pretty easy to use.
Flash Any Modem For The T-Mobile Galaxy S3
Modems Supported are UVALEM, UVDLH3, UVLG1, and UVLH2.
Uses Unique Aroma Installer
Touch Based Installer
So if you need to flash a new modem, this is definitely an application worth looking into. For more details, got to the original thread.___________________