USSD Guard – Stop SIM popups

One accidental tap on an operator popup can start a paid subscription. SIM cards can push promotional dialogs straight onto your screen — over any app, even over the lock screen. They look like system messages, they appear at random, and the OK button is exactly where your thumb lands. One mis-tap, and you are subscribed to a service you never asked for. USSD Guard watches for these popups and closes them before they can trap you. HOW IT PROTECTS YOU • Detects SIM Toolkit (STK) and USSD dialogs the instant they appear — even while your phone is locked in your pocket • Auto-blocking closes them with Back, faster than you can read them • Smart context rules: your own balance checks and SIM menus you opened yourself are never touched • It never presses OK — on a subscription popup, OK is the consent. USSD Guard only ever sends Back. A FULL AUDIT TRAIL Every popup is logged with the exact text it showed, when it arrived, and what the guard did. Judge each decision Correct or Wrong to keep detection sharp. Short codes mentioned in popups are recorded — if a mystery charge ever hits your balance, you have the evidence. YOUR DATA STAYS YOURS • Detection is 100% on-device — popup text never leaves your phone • No SMS permission, no contacts access, no ads, no tracking • Only purchase processing contacts Google Play FAIR PRICING — THE OPPOSITE OF A SUBSCRIPTION TRAP Watching and logging is free forever. Automatic blocking is free for your first 14 days, then one single one-time unlock. The app that blocks subscription traps will never charge you a subscription. GUIDED SETUP USSD Guard uses Android's accessibility permission — the only sanctioned way for one app to see and close another app's popup. A step-by-step guide walks you through every screen, including the battery setting that keeps protection alive on Samsung and similar phones. Made in Tunisia, for everyone tired of popup spam.

First release of USSD Guard 🛡️ • Detects unwanted operator popups (SIM Toolkit / USSD) the moment they appear — even on the lock screen • Auto-blocking mode closes them with Back before a mis-tap can subscribe you • Full guard log: every popup, what it said, and what the guard did • Guided setup — accessibility service and battery settings, step by step • 100% on-device detection. No SMS access, no ads, nothing sent anywhere