avast! Free Mobile Security

Protects you from malicious attacks and helps locate your lost/stolen device.

Rated 4.5 stars in Google Play

4 essential features that no Android user should be without

Neutralizes Malware Threats

Protects you from malicious attacks and helps locate your lost/stolen device.

Locates Your Device

Helps locate a lost/stolen device via its cellular network, GPS, and/or Wi-Fi.

Filter Contacts

Lets you filter people you don't want to contact you via call or SMS messaging.

Monitor Data Usage

Breaks down your data usage so you can avoid overages and save money.

+30 other features

The app comes loaded with features that allows you to remotely control your device and more...

See what others have said

"We recommend avast! Mobile Security & Antivirus"

PC Mag

"A comprehensive suite of security and backup tools, with a particularly strong set of anti-theft features that could well catch a thief in the act"

PC Advisor

"We recommend trying avast! Free Mobile Security. This app offers a range of malware protection and tools to help you find your Nexus 4 if it ever gets stolen or lost"

Digital Trends

Premium features also available

Geo Fencing

Phone performs specified actions (e.g. lock, siren, send location) when it leaves a set perimeter.

App Lock

Lock an unlimited number of apps in order to prevent their unauthorized access.

Detect App Ads

Detects ads and provides full details of their tracking systems.

Take Picture of Thiefs

Locks access and takes a picture of the person attempting to unlock your device after three tries.

Download App to learn more

Existing Users

Choose how you want to control your lost or stolen device

SMS command structure

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

LOST

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

FOUND

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

LOCK

Sample: 2222 LOCK Lock the mobile phone

UNLOCK

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

SIREN ON

Sample: 2222 SIREN ON Turn siren on

SIREN OFF

Sample: 2222 SIREN OFF Turn siren off

LOCATE

Sample: 2222 LOCATE Locate the device

LOCATE <interval duration in minutes>

Sample: 2222 LOCATE 5 Track the device continuously

LOCATE STOP

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.

WIPE

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

GET CONTACTS

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

LAUNCH

Sample: 2222 LAUNCH Launches avast! Anti-Theft user interface

CLOSE

Sample: 2222 CLOSE Closes avast! Anti-Theft user interface

REBOOT

(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)

SET USBLOCKMODE <USB lock mode>

(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)

SET BATTERYSMSMODE <battery mode>

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>

Samples:

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.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.putExtra("number", origNumber);
i.putExtra("cmd", data);
i.setComponent(cName);

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.

Your browser is obsolete.

1. On 8 April 2014, Microsoft stops support for Internet Explorer browsers running on Windows XP. This will put your computer and data, such as credit card and online banking details, at greater risk to hackers and malware.

2. Several browser alternatives exist, but we at AVAST use and recommend Chrome, as we find it to be the most-secure option available.