What is the latest version of symbian belle gor nokia 5233 rm-625?

Latest version for Symbian Belle RM625 Nokia5233 is 41.0.010.

But, the Nokia Official (default) version is 51.1.002.

Note:

If you are going to upgrade your firmware please, check your handset current firmware 1st (*#0000#). Never downgrade, downgrade will kill your phone.