Thank Corea!
i have successfully transferred file from android to bookworm(but not
trixie):
in blueman of bookworm, make it visible. then in file manager of
android, choose file, choose share, choose bluetooth, choose which
device to send. then bookworm will show dialogs for pairing and file
transfer...
but transfer speed is slow. for 3G file, it might take more than 10 hours
why not use usb connection of cell phone? there's something in usb
socket of phone, usb connection isn't good enough for file transfer
though charging is still possible
i might have to ask professional to clean usb socket of phone
