How to protect phone against malware ?

How can i protect my mobile phone against malware ? is there any software ? I am using nokia N70.

Thanks

In general, keep your Bluetooth connection in hidden mode unless you specifically need to be visible to others.
Exercise caution when accepting applications sent via Bluetooth or MMS. In practice this means not opening attachments sent via these connection methods unless you know what they are.

Do not approve or download content to a mobile device from an unknown or unreliable source.

you may review this guides to prevent the virus from your mobile phone
>Always switch to Bluetooth invisible mode,unless you specifically need it to be visible. This will help prevent other Bluetooth-enabled devices from finding your phone (unless you grant them the necessary permission) and will therefore help protect your phone from worms that spread using the Bluetooth wireless technology.
>Practice caution before opening attachments. When accepting applications sent via Bluetooth, or opening MMS attachments, because they may include harmful software. Ensure the application or attachment comes from a reliable source, avoid opening files that have unfamiliar text attached to them, even if they send by your native
> Only download content from a trusted source. Trusted sources may include operator portals and other well-known brands that offer adequate protection against viruses and other harmful software. wary as with emails, malicious or fraudulent users have the capability to fake the appearance of a trusted source
>install a good anitvirus application i recommend you kaspersky