Hi i got a unlocked Firmware version 1.02 iphone... no matter what sim i use it shows t carrier logo as Vodafone...It should be showing Hutch or Airtel on my 2 sims but just shows Vodafone..how can i get t default carrier of my sim company...???

Probably your SpringBoard file is patched in order to display graphic logos.
Check out this thread ([Only registered and activated users can see links]) :)