lg gd900.......

Hi,
can anyone help, i have a new lg 900 cystal on orange contract, when i try to go online on to orangeworld, bbc sport etc i only have text format only,,,
however if i put my old o2 sim into phone and go online i dont have aproblem.
i can see pictures and ca access all sites no problem...
also if i put my orange sim into my old phone and go online , i dont have a problem with that phone either,,, is it me or is it strange and its doing my head in.