23-05-2013 7:49 - edited 23-05-2013 7:51
You will not find any update for this more than 5 year old device. If you have never updated it, you may try your luck by following the procedure mentioned HERE .
You may check if you get the 'Re-install' option as seen in the attachment.
BTW, what Reset did you try ? Was it only a Factory reset or a soft reset by dialing *#7370# ? If you have not tried the later, first back-up all your data as the reset will erase all the data from the phone memory. Then dial the code mentioned followed by 12345 (Default security code unless changed by you..) when prompted.. Then see the difference ..