You can flash it with W800 R1BC002 firmware. Why this? Because for this firmware is a lot of patches, which can make Your phone better ;)

You can also load new camdriver, better acoustic, new menu icons... Search at this board. Here is a lot of modifications under W800 R1BC002.

Can someone show me the way
to do flashing and customise this phone????
search. Here is a Tutorial for FAR and PhoneXS. Just search...