Hotfile link above is very slow, took 2hrs to download firmware (224MB).

Extracted S5230XPKB1.rar file, recompressed files using 7zip 'ultra compression' reduced files to 89.8MB.

S5230XPKB1 firmware uploaded to faster hosting sites:

Available for users only
S5230XPKB1 - best recent European firmware I've tested.