well i know in W810i you know when a firmware is newer than the one you have when the letters are further down the the alphabet... let me see if i can clear myself up

let's compare 2 W810i Main (should be the same way to check firmware in W800i, etc.)
let's say i have R4DB005 Main and i want to upgrade to R4EA031 Main. how do i know it's newer??? because the 1st Main is R4D and the 2nd Main is R4E which means R4EA031 is newer than R4DB005