Sounds like you installed a cab that was meant to remove the "start" text on a 6.5.x rom. On these roms the start menu is at the bottom of the screen instead of the top. To verify what rom you are using go to the settings tab, about phone, software version. Unless you have flashed hspl2 and changed your rom, you are on the stock t-mobile rom which is only windows 6.5. welcome to the site.