Update Symbian Anna to your Nokia phone

Here is the download link of the Custom firmware for your symbian Nokia phone to upgrade it to Symbian Anna !
http://www.symbiantweet.com/symbian-anna-custom-firmware-for-nokia-5800

If you wish to read the installation instruction, here’s the link : (you may need to translate it to english through google translate, or if you are using Google Chrome as your browser then, you ll have the option to  translate the page to English right after you load the link)

http://www.symbianlatino.com/2010/03/instalar-un-firmware-modificado-en-tu.html

If you wish to revert back to the original Classic symbian firmware for your phone , here’ the link:
http://www.symbianlatino.com/2010/12/firmwares-nokia-classic-edition.html