hey guys i recently bought a galaxy tab 2 10.1 GT-P5100 the 3g model and its in chinese 4.0.3 and i need the australian version of the firmware untouched. i dont want to root it. and i cant use kies as its unavalible with the model i got... can someone help me asap. also can i downgrade to 3.0 australian then upgrade to 4.0 i need a guide aswell as im a noob 
