avast! Mobile Security

 Credit To Avast Team --A good security app that goes beyond the basic anti-malware and offers a set of 3 Protection Shields, an App Manager, SMS & Call Filtering, a Firewall, Network Traffic Monitor and advanced Anti-Theft options with SMS and Online commands to find your phone.

The Anti-Theft's most advanced features and the Firewall need a rooted device to work. Starting from version 3.0 it is a feature-limited freeeware. More demanding than previous versions on older phones.