USSD codes are keypad commands that can be used to access a variety of phone functions, from checking minutes to accessing expert controls.

Malicious web pages have recently exploited USSD Android functionality. By tapping the wrong web link or scanning a bad QR code, an unsuspecting user can execute a USSD wipe that disables the SIM card or even executes a factory reset, also known as a dirty USSD hack.

Fortunately, Avira now offers a USSD Android exploit detection app. It’s a free and easy way to protect your phone and sim card’s contents from unauthorized deletion.