USSD (Unstructured Supplementary Service Data) is a Global System for Mobile(GSM) communication technology that is used to send text between a mobile phone and an application program in the network. USSD is similar to Short Messaging Service (SMS), but,unlike SMS, USSD transactions occur during the session only. USSD is commonly used by prepaid GSM cellular phones to query the available balance. In some countries mobile providers using the USSD to make money when user click it..
turn it to notifications! android x.x free - https://play.google.com/store/apps/details?id=com.aeon.ussdtonotification APK Mirror paid - https://play.google.com/store/apps/details?id=sk.paco.ussd
Android <=4.2.1></=4.2.1**>https://play.google.com/store/apps/details?id=com.melkote.quietbalance source - http://subharanjan.com/block-balance-update-messages-ussd-notification-android-smart-phones-solved/
android x.x root needed - GravityBox (it is an Xposed module) - search XDA source - http://android.stackexchange.com/questions/51875/is-there-a-way-to-block-ussd-balance-notifications-on-android-4-3
origin - http://www.pipiscrew.com/?p=3364 android-block-the-ussd-popups