You can downgrade it to any of CFW's (M33's), so the newest is 5.03 M33, but I recommend you 5.00 M33-6 - super CFW ;)
Rossi IS the maker. Rossi is currently owned by Taurus.
how to activite the gprs to my m33 cherrymobile
Google the keywords "M33-1 for PSP" and you will get sites from which you can dl the update.
You will have to call Rossi with the serial number to find out.
Valentino Rossi is straight. He has made no statements or indications otherwise.
you cant because M33-6 gets corrupted and M33-3 gives an error code
the CTF theme you are using is made for GEN or OE you have m33 when you search for CTF themes include "5.00 m33" in your search
South America
Yes. Any firmeware that enda in GEN or M33 or anything like that can play ISOS and CSOS.
Rossi manufactures its classic rifles in a plant in Sa Leopoldo, Brazil.
I believe they are produced in Brazil.