Avast Free Mobile Security

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New! Avast Free Mobile Security 5

Mobile viruses and malware are on the rise

Hackers create 2,850 new mobile threats every day. It’s best to play it safe with Avast Free Mobile Security.

Security for data and devices

Not only do you get world-class hacker protection, but you’re also protected against privacy loss and identity theft. With Avast Free Mobile Security, you can back up personal data and track your phone or sound an alarm if it's lost or stolen.

Lock specific apps

Add an extra layer of security by locking personal apps like Amazon, Facebook, or WhatsApp.

Filter incoming calls and SMS

Block specific numbers from calling or messaging you.

Remote lock and wipe

If your phone can’t be found, lock it and completely wipe it clean so thieves can’t take advantage of you.

Complete list of features

Avast Mobile Security

Improved Avast Widget

Display a status bar on your phone’s desktop, providing instant easy access to your Android antivirus app.

ImprovedWeb-based Control

Control your phone’s Anti-Theft options directly from your Avast Account web portal.


Enable auto-correct of mistyped URLs, with options for 'auto-redirect' or 'request confirmation'.

ImprovedNetwork Meter

Know how much data transfers into and out of your phone via 3G and/or Wi-Fi connection. See stats for the day, month, or year, with direct access to App Manager if you want to make changes.

ImprovedUser Interface

Use Avast Mobile Security even on your Android tablets, as the UI has been optimized for tablet display.


Avast Mobile Security


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.


Add a firewall to stop hackers. Disable an app's internet access when on Wi-Fi 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.

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.

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.



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.

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, Wi-Fi, 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 History

Query the call log, contacts, and SMS messages remotely (with each forwarded as a separate SMS message, but able to be filtered).

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 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.


Avast Premium Mobile Security

We now offer a premium pack that includes more security features!


Set a perimeter with Geofencing

Your phone will execute specified actions, such as lock, siren, and send location, when it leaves a set perimeter.

Stolen device lock

Lock stolen devices and take a 'theftie'

Prevents access to and takes a picture of anybody attempting to unlock your device after three tries.

Ad detection

Detect which apps use ads

Detects ads and provides full details of their tracking systems.

Anti-Theft Controls

Avast Free Mobile Security lets you control your lost or stolen phone through the Web or SMS.

See the two ways you can control an Avast-secured phone.

SMS command structure

All SMS commands must begin with your Avast PIN code.
For example, if your Avast PIN code is set to 2222, a lock command should look like this:
2222 LOCK


Sample: 2222 LOST Marks the phone as LOST. This command initiates the same actions as a SIM card change, depending on the settings.


Sample: 2222 FOUND Marks the phone as FOUND. This command disables the phone lock as well as the siren alarm.


Sample: 2222 LOCK Lock the mobile phone


Sample: 2222 UNLOCK Unlock the mobile phone

MESSAGE <message text>

Sample: 2222 MESSAGE Give back my phone! Will display a message on the phone. Can be dismissed. Use LOCK and SET LOCKTEXT to display a sticky message


Sample: 2222 SIREN ON Turn siren on


Sample: 2222 SIREN OFF Turn siren off


Sample: 2222 LOCATE Locate the device

LOCATE <interval duration in minutes>

Sample: 2222 LOCATE 5 Track the device continuously


Sample: 2222 LOCATE STOP Stop continous tracking

CALL [phone number]

Sample: 2222 CALL Sample: 2222 CALL +43660333555 If no phone number is given this command causes the phone to call you back. If you give the phone number the phone will call the given number

FORWARD SMS [phone number]

Sample: 2222 FORWARD SMS Sample: 2222 FORWARD SMS +43660333555 If no phone number is given, incoming SMS will silently be forwarded to the phone that sent the command. If a phone number is given, incoming SMS will be forwarded to the given phone number. This command overrides all previously issued SMS-forwarding-settings.

The forwarding can be cancelled by issuing the FORWARD SMS STOP command or by launching Avast Anti-Theft.

CC SMS [phone number]

Sample: 2222 CC SMS Sample: 2222 CC SMS +43660333555 Same as FORWARD SMS, but will not delete the SMS after forwarding which means that the forwarded SMS will still be delivered to the target phone (CC means carbon copy). This command overrides all previously issued SMS-forwarding-settings.

The forwarding can be cancelled by issuing the CC SMS STOP command or by launching Avast Anti-Theft.

CC CALLS [phone number]

Sample: 2222 CC CALLS Sample: 2222 CC CALLS +43660222333 By issuing this command you can request SMS notifications about incoming calls. The notifications will be sent to the phone that issued the command if no other phone number is given. This command overrides all previously issued call-forwarding-settings.

We did not implement direct forwarding of the calls as this works differently in the networks around the world. Also it is not possible to hide the forwarding settings from the thieves eyes reliably.

The forwarding can be cancelled by issuing the CC CALLS STOP command or by launching Avast Anti-Theft.

CC ALL [phone number]

Sample: 2222 CC ALL Sample: 2222 CC ALL +43660222333 Combines the CC SMS and the CC CALLS command. This command overrides all previously issued SMS- and call-forwarding- settings.

The forwarding can be cancelled by issuing the CC ALL STOP command or by launching Avast Anti-Theft.


Sample: 2222 WIPE Wipe all data from the phone

GET <query limit> SMS

Sample: 2222 GET 10 SMS Query SMS messages

GET <query limit> INBOX SMS

Sample: 2222 GET 10 INBOX SMS Query received SMS messages

GET <query limit> SENT SMS

Sample: 2222 GET 10 SENT SMS Query sent SMS messages

GET <see above> SMS FOR <phone number>

Sample: 2222 GET 10 SMS FOR +43660333555 Query SMS messages matching the phone number given


Sample: 2222 GET CONTACTS Query the contacts from the address book

GET LOG <query limit>

Sample: 2222 GET LOG 10 Query the call and SMS log


Sample: 2222 LAUNCH Launches Avast Anti-Theft user interface


Sample: 2222 CLOSE Closes Avast Anti-Theft user interface


(only for rooted devices) Sample: 2222 REBOOT Reboots the device

SET OWNER <name of owner>

Sample: 2222 SET OWNER Charles Chaplin Will change the device owner name

SET PASSWORD <access code>

Sample: 2222 SET PASSWORD 3333 Will change the Avast password. You will need to provide a password of 4-6 digits

SET FRIEND 1 <phone number>

Sample: 2222 SET FRIEND 1 +43660122220192 Will change the phone number of the first friend. Provide a valid mobile phone number

SET FRIEND 2 <phone number>

Sample: 2222 SET FRIEND 2 +43660122220192 Will change the phone number of the second friend. Provide a valid mobile phone number

SET ONLYFRIENDS <friends mode>

Sample: 2222 SET ONLYFRIENDS 1 Will change the SMS command authorization mode (0 = allow all numbers, 1 = allow only friend commands)

SET LOCKMODE <lock mode>

Sample: 2222 SET LOCKMODE 1 Will change the phone lock setting (0 = do not lock, 1 = auto lock)

SET SIRENMODE <siren mode>

Sample: 2222 SET SIRENMODE 1 Will change the siren setting (0 = no siren on lock, 1 = siren on lock)

SET APPLOCKMODE <app lock mode>

Sample: 2222 SET APPLOCKMODE 1 Will change access to the program manager or phone settings (0 = no setting active, 1 = deny program manager, 2 = deny phone settings)


(only for rooted devices) Sample: 2222 SET USBLOCKMODE 1 Will change the USB debugging access setting (0 = do not lock USB debugging access, 1 = lock USB debugging access)

SET FORCEDATAMODE <force data mode>

(only for rooted devices) Sample: 2222 SET FORCEDATAMODE 1 Will change the force data connection setting (0 = do not force data connection, 1 = force data connection)


Sample: 2222 SET BATTERYSMSMODE 1 Will change the low battery notification setting (0 = do not notify on low battery, 1 = notify on low battery)

SET LOCKTEXT <lock text>

Sample: 2222 SET LOCKTEXT Please call me back at +4313283483 Will change the custom lock text

SET AUTOGPS <gps mode>

Sample: 2222 SET AUTOGPS 1 Will enable or disable automatic enablement of GPS (0 = turn off, 1 = turn on)

SET WIPEMODE <wipe mode>

Sample: 2222 SET WIPEMODE 1 Will enable or disable thorough wipe (0 = turn off, 1 = turn on)

SET PROTECTION <protection mode>

Sample: 2222 SET PROTECTION 1 Will enable or disable Anti-Theft protection (0 = turn off, 1 = turn on)
Caution: By using this command you will completely disable the Avast! Anti-Theft system thus rendering the Anti-Theft protection useless.

Implement own remote commands

Avast! Anti-Theft is able to launch any programs on the phone and pass data to the launched program.

SMS command: <Activity or service name, fully qualified> <arguments>


2222 at.domain.package.Activity Test will start the activity OR service at.domain.package.Activity and pass Test as an parameter to it.
2222 at.domain.package.Activity This is my command line will start the activity OR service at.domain.package.Activity and pass This is my command line as an parameter to it.

The activity or service needs to be positioned on the root of the package (sub-packages are NOT supported).

Data transfer is done via Intent:

Intent i = new Intent();
i.putExtra("number", origNumber);
i.putExtra("cmd", data);

This means you can then read (in your service or activity) the sender number in the String extra number and the command from the String extra cmd.

Anti-Theft always tries to start an Activity first, if none is found it tries to start a Service, if this fails it will reply with an error SMS.

There’s security in numbers

More people around the world trust Avast for their security than any other company. That means better security for all of us. The reason is simple: We see and react to more data from more users, so we can make your protection better.

230+ million customers

186 countries

43 languages

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