Symantec has issued an alert over three new trojan horse applications for Symbian powered phones. These will affect Nokia's S60 line of smartphones. The trojans are being called: SymbOS.Bootton.E, SymbOS.Pbstealer.D and SymbOS.Sendtool.A. To be affected you will have to install an application, so use general precautions before installing software on your phone (e.g. know who it's from).
Filenames to watch out for include: Fspreader.SIS, ChattingYuk.SIS, PBCompressory.SIS and Restart.S60.SIS.