Series60 are a series of nokia phones running symbian OS.

Useful software:

• Gnubox lets you use IP over bluetooth.
• putty for n70 is available
• shape software (chermans) make some nice IM software that's payware
• Python for the series 60 was released as Free software by Nokia.

Useful tips:

• *#7370# will let you do a factory reset
• *#0000# will show you the software version
• Holding down the menu button will let you switch between apps, holding down C while switching apps will kill the currently selected app
• *#92702689# will show you the total talking minutes of the phone