Prevents malicious websites from using the recently discovered tel: URL attack and potentially remotely wipe your Android device. Many Android phones have a security flaw where they will automatically dial any telephone number touched on a web page. USSD codes are numbers that can provide system info such as the IMEI number and possibly even do a factory reset. NoUSSD will intercept all USSD codes and give you the choice to not dial them. Regular phone numbers will be sent automatically to your favorite dialer.