shouldnt need to flash different radios. theoretically,the t mobile firmware should give you the best performance on t mobiles network. all the firmware of the phone must match,so i would not recomend that you change any part of it without changing all of it. changing only the radio may not give you any noticiable issues,but i doubt it will work as well.
i would search your roms support threads for others having the same issue. it is possible aroma is a prollem. i personally hate aroma- id much prefer to flash roms and mods the old fasioned way as seperate zip files.
The Delivery Guy
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