Each phone has different chips inside it. While the phone may look the same and even share hte same code name, that doesn't mean that the Cingular 2125 ROM would work on the T-Mo SDA. While you might get it loaded, you will see a lot more stability issues, and all around general problems.
Want a Chance to Win? Check out our Gigantic Giveaway Event
"I have no special talents, I am only passionately curious" - Albert Einstein