An owner says no go
http//www.p800.it/public/index.php?act=ST&f=19&t=448&s=27f4e510cc563afebef7 63e4b5285456

Two incompatible ericsson products ?! o (

I can't read the other forum, so I don't know what it says, but I think it should work, as it operates via BT, How many BT phones do SE have?

http://www.expansys.com./product.asp?code=ERIC_CHATPEN&asource=P800 - Expansys suggest it as a P800 product.

Maybe he has the pre-commercial firmware? Don't speak italian, so couldn't understand his post, but I do know the pre-commercial firmware had some big Bluetooth problems...