I really want to flash 2.3 to my Galaxy 3, I've given up on useless vodafone because they wont authorise the upgrade to 2.2.
How do I make a backup for the firmware I have now? i can't find it online anywhere, its a custom Vodafone one I'm assuming.
Also, do I need to root the phone before flashing it? No guides I've read say you do.
And if it doesnt go as planed, how can I roll back?