k810i pls help updating firmware

[LmAn`]

hi can anyone teach me how to update my k810i firmware...
ihave R6 firmware and iwant it to update to the latest version R8... pls help
and one thing iforgot my security code...how can i set it to default password "0000" help plss

Download R8BA024 FS+Main. Flash your FS & Main with XS++, then Customize you FS. After this your security code will be restarted!