The Nokia N70 has bluetooth and communicates via a standardised protocol called Obex. In standard Ubuntu, sending files to the phone is possible after creating a new connection on both the phone and PC. When you send a file to the phone, it comes as a message in the Inbox and you get the chance to save it at a location of your choice. However sending a file from the phone to the PC failed. This is the simplest method I've found to do it.

Install obexpushd : ''sudo apt-get install obexpushd''

Now go the folder on the PC where you wish to receive the files and open a terminal there.\\
Type : ''obexpushd -B''\\
to start the obex push server and just send your files from your phone..\\

You have to investigate ''ussp-push'' if you fail to send files to your phone but the normal Ubuntu bluetooth manager seems to do the job.