Convert a SE k800i to SE k810i with Xs++

Do you know Simply Modding convert a k800i to a k810i? Attention before u do this :IF YOU ARE NOT CONFIDENT IN DOING THIS GUIDE OR BEING ABLE TO REVERSE IT THEN DO NOT ATTEMPT THIS GUIDE! YOU HAVE BEEN WARNED!!!
YES THIS WILL INVALIDATE YOUR WARRENTY! .. ANY KIND OF MODDING WILL INVALIDATE IT TOO!. Read Here if you wanna read basic modding Sony Ericson.

Important : First of all ,
Things you need
*XS++
*Main Firmware & Filesystem(Password = kkan)
(The Latest Main firmware+Filesystem | R8BA024 )(There Is a VKP File in The zip (this vkp is to unlock your flashed k810i later on if you want to keep the vkp you can!) , if not just delete that ...no need of that

Here the Step :
1. Connect Your Phone
Install The Phone XS++ & Connect The Phone (start turn the phone off remove the memory card and take out the battery for a few seconds ... then replace the battery and connect your USB CABLE first to the phone whilst holding the "C" key down then connect it to your USB PORT (still holding the "C" key!))




2.Flashing MAIN FIRMWARE + FILE SYSTEM & CUSTOMIZATION



>Select the downloaded main firmware & filesystem
>select customize filesystem
Model = k800
Select CDA & Region = EUROPE_2(CDA102511/2)
>Set the options as above & Hit FLASH

##This selection is only for the files i hav mentioned above(R8BA024 - MAIN FIRMWARE + FILESYSTEM)##

After all these processes you will get a massage = Disconnected,Unplug Your Phone

>Then Unplug Your Phone ,Remove the battery & reinsert it .Then Turn On The Phone ....
Now U hav Ur new k810i )

Thats all, Good Luck

Source : Solidsnake204