help!-cid 53-australia

I am going to flash my s500i (locked to virgin mobile australia) to a w580, it is also a cid 53 and I am going to use far.....
I live in australia, can i put the American firmware on it?
And if not where can the australian firmware and is there anyway I can back up if anything goes wrong...


thanks soooooo much if you can help me!

there is no free way to back ur gdfs so take care but if it does go wrong hopefully it doesnt there are tools online to fix it