33xx new vs. 33xx old

[r_oneill15]

what is the difference between 33xx new and 33xx old

[ShadoW2004]

Look here http://nokiafree.org/forums/t68079/h/s.html

[r_oneill15]

but how will you know if your cellphone is 33xx old or 33xx new?

i have 3315 w/ original ver 5.57 then changed it to 6.33.
tnx in advance