6310i firmware

how do i find the v of firmware that my phone is running on

For my 6310 the sequence *#0000# does the trick.

Probably this works for a 6310i too.

Next question - where can you find the latest version number of the firmware?

latest firmware for the 6310i is 5.51 (08-07-03).

I had mine upgraded recently as it was still within it's warranty period they did it for free !