recently i flashed my phone using these files, for some reasons my blue tooth picks up the sign, but when i try to send something, it gives me an error, that saying that "check your or their bluet ooh"

does anyone have k800i blue tooth files

Why don't you flash R8BF003 firmware?

you think that if i flash this phone using R8BF003 would work? , b/c i have tried another one before but no luck

Try it and post the results.

Did you dropped your phone or something? The bluetooth antenna could be misaligned somehow!