Avast introduces mobile security for android (free)

Avast! Free Mobile Security
Full-featured Antivirus and Anti-Theft security for your Android phone

Protect your personal data with virus scans and remote history wipe
Control anti-theft/monitoring features remotely, via SMS commands
Keep your kids safe with remote tracking, phone history, and call/SMS filters
Get infected-URL alerts and/or stop hackers by adding a firewall to rooted phones


Why choose avast! Free Mobile Security?

A standalone yet tightly integrated component of the avast! Mobile Security environment, avast! Anti-Theft is the slyest component on the market – because your security app should not alert potential thieves about its presence. You'll be able to remotely control your 'lost' phone by SMS at any time, with no signals indicated on the phone itself. Formerly known as Theft Aware, the Anti-Theft portion of avast! Free Mobile Security has been recommended by leading industry experts that include T-Mobile, N-TV, AndroidPIT, and Android Police.
avast! Mobile Security

Antivirus
Performs on-demand scans of all installed apps and memory card content, as well as on-access scans of apps upon first execution. Options for scheduling scans, virus definition updates, uninstalling apps, deleting files, or reporting a false-positive to our virus lab.
Privacy Report
Scans and displays (grid) access rights and intents of installed apps, identifying potential privacy risks, so you know how much info you are really providing to each app.
SMS/Call Filtering
Filter calls and/or messages from contact list using set parameters based on day(s) of the week, start time, and end time. Blocked calls redirect to voicemail, while blocked messages are stored via filter log. Also possible to block outgoing calls.
App Manager
Similar to Windows Task Manager, it shows a list of running apps and their size (MB), CPU load, used memory, and number of threads and services – with an option to stop or uninstall.
Web Shield
Part of the avast! WebRep cloud, the avast! Web Shield for Android scans each URL that loads and warns you if the browser loads a malware-infected URL.
Firewall
Add a firewall to stop hackers. Disable an app's internet access when on WiFi and 3G and roaming mobile networks. (Works only on rooted phones.)
avast! Anti-Theft

App Disguiser
After downloading avast! Anti-Theft, user can choose a custom name that disguises the app (e.g. call it "Pinocchio game") so that it is even harder for thieves to find and remove.
Stealth Mode
Once anti-theft is enabled, the app icon is hidden in the app tray, leaving no audio or other trace on the target phone – the app is 'invisible', making it difficult for thieves to detect or remove.
Self-Protection
Extremely difficult for thieves to remove (especially on rooted phones), Anti-Theft protects itself from uninstall by disguising its components with various self-preservation techniques. On rooted phones it is able to survive hard-resets and can even disable the phone's USB port.
Battery Save
Anti-Theft only launches itself and runs when it needs to perform tasks. This preserves battery life and makes it very difficult for thieves to shut it down.
SIM-Card-Change Notification
If stolen and a different (unauthorized) SIM card inserted, the phone can lock, activate siren, and send you notification (to remote device) of the phone's new number and geo-location.
Trusted SIM Cards List
Establish a 'white list' of approved SIM cards that can be used in the phone without triggering a theft alert. You can also easily clear the trusted SIM cards list, to leave the one present in the phone as the only trusted one.
Remote Settings Change
A setup wizard guides the user through the installation process on rooted phones by either writing directly or by generating an update file. No command-line knowledge is necessary to install Anti-Theft rooted. Also supports upgrading the app.
Remote Features

Remote Siren
Option to sound a loud siren, which returns always to maximum volume if thieves try to silence. This siren sound can also be customized (e.g. record own siren sound or select siren sound from file).
Remote Lock
To protect your data, phone can be locked remotely and then cannot be accessed again without entering the password specified by the user.
Lock Phone Settings Access
Enables remote locking of the phone's App Manager and/or phone settings.
Remote Display
Remotely send a customized message to locked or non-locked phone display (e.g. with a reward for its return).
Remote Locate
Remotely locate phone via GPS, WiFi, or mobile network – for maximum accuracy. Can locate either once or continuously (GPS can be auto-enabled on all rooted phones or non-rooted phones from Android 1.6 to 2.2).
Remote Memory Wipe
Remotely trigger a full, permanent wipe of all phone data (e.g. contacts, call log, SMS/MMS, browser history, apps, email accounts), including reliable, physical wipe of all memory cards from Android 2.2 on (limited functionality on older versions).
Remote Calling
Remotely have the phone call you elsewhere with screen blackened, so that thieves cannot see it. This way you can listen to the phone's surroundings.
Remote Forwarding
Remotely activate/deactivate option to forward or copy call data and/or SMS messages to another device. Call data goes to remote device, but not the call itself. SMS messages, however, are forwarded in their entirety ("CC" copies also to original device).
Remote "Lost" Notification
Remotely send a "Lost" command to trigger same actions as SIM card change (e.g. phone lock, siren, or USB lock). "Found" command deactivates "Lost" command.
Remote SMS Sending
Remotely trigger phone to send an SMS to another phone. That way, if you forget the phone somewhere, you can reply nonetheless to incoming calls or SMS messages.
Remote History
Query the call log, contacts, and SMS messages remotely (with each forwarded as a separate SMS message, but able to be filtered).
Remote Restart
Reboot the phone by SMS command, which will lock the phone by asking for the SIM's PIN code. (Works only on rooted phones.)
Low Battery Notification
Phone is able to send low battery notification to a secondary device.
Remote Settings Change
All of the Anti-Theft settings can be changed remotely.