I have succesfully rooted the phone(SGH-T989D or Galaxy SII X, or whatever it's called) and CWM Recovery. I then proceed to try and install the seemingly appropriate ROM from: wiki. cyanogenmod. com/wiki/Devices_Overview#Samsung_Galaxy_S_II_.28T-Mobile.29
I followed the flashing instructions from wiki. cyanogenmod .com/wiki/Samsung_Galaxy_S_II_(T-Mobile):_Full_Update_Guide
And now the phone is stuck on the Cyanogenmod 9 bootscreen, and the computer stopped recognizing it while CWM is on.
I am lost, confused and frustrated. This phone is brand new and I don't know what to do.