hi guys, my story as the following:

my can is X5 2003 3.0, i have pre-installed BIT II phone and i upgrade it to bluetooth (snap in- antenna and antenna cable-ULF bluetooth 13th GEN)

before i install the uls bluetooth (already remove the BIT II ULF) there was a telephone on my screen, i upgrade the navigation to the new firmware then i loose the telephone on the screen, after that i install the blluetooth ulf, it didnt work, then i went to BMW dealer in kuwait to retrofit it, they call me today and said still its not working i told thim what i did and to try to upgrade the navigation, but no reply yet.

what shall i do ???