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.

How to prevent sending files via Bluetooth on Nokia 5800 XpressMusic without noticing me. sometimes it is annoying, the stranger will send files to you automaticly, if your Nokia 5800 bluetooth is active and he know your bluetooth pairing passcode( usually the original bluetooth passkey is 0000). then he will send the files to you directly if you put the nokia phone in other bluetooth range. so you should disable your bluetooth to prevent receive files via bluetooth. you can go to Nokia 5800 XpressMusic Menu key > Tap …