you can transfer files from Nokia 5800 XpressMusic to BlackBerry or other phones via bluetooth, like mp3,ringtones etc. it will let you send files more convenietly. from home Menu key > Tap Gallery > Tap the media folder you want (e.g. Images & videos) > Tap the media file you want to send > Tap Options > Tap Send
Tap Via Bluetooth > Tap More devices > Tap the BlackBerry phone or bluetooth devices you want to send to.