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Norton Halt USSD Code Blocker for Android

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URGENT: Your Android device may be vulnerable to the malicious USSD codes exploit, which can initiate a wipe of data on your phone and SIM card. This vulnerability potentially affects any Android device running anything below Android 4.1.x (Jelly Bean). It is strongly recommended that you address this flaw immediately, as your mobile carrier may not have provided an over-the-air software update.


Monitor for suspicious USSD Code requests
Stop the dialer from executing USSD Codes without your permission
Prevent loss of personal data and financial information
Advanced USSD filtering, including string detection and special characters. (Many competing USSD apps can't do both.)


USSD stands for Unstructured Supplementary Service Data and is a session based GSM protocol unlike SMS or MMS. Typically, it is used to send messages between a mobile phone and an application server in the network. There are multiple services based on USSD such as: mobile banking, social networking (Facebook, Twitter), over-the-air mobile software updates, and prepaid/recharge accounts.

The USSD exploit was announced by security researcher Ravi Borgaonkar during September 2012. He successfully demonstrated how an Android device could be wiped out simply by opening a website containing malicious HTML code which initiated a factory reset. Although Borgaonkar disclosed the vulnerabilities to manufacturers and carriers in June 2012, many users to date still have not received a patch for the firmware. As a solution, many users have opted to install an app that will check for and block unauthorized USSD requests such as "tel:" URI (uniform resource identifier) attacks.

Norton Halt helps protect your device from USSD attacks. Don't let your life be wiped away.
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