How it works
When you click on a web link or scan a QR code, Android will open a dialog with a list of apps that you can choose from to complete the action. Select ‘Avira USSD Exploit Blocker’ and set it as the default.
Protecting your phone from the USSD Android exploit is that simple!
What is a USSD code anyway?
USSD codes are keypad commands that can be used to access a variety of phone functions, from checking minutes to accessing expert controls. USSD commands typically contain a mixture of numbers, stars and pound signs.