Any app or website promising "USDT mining" is designed to steal your money, personal data, or crypto wallet access.
USDT is a stablecoin. It's created (minted) by Tether Ltd. when someone sends them real dollars. There is no proof-of-work algorithm for USDT.
1️⃣ You download the fake APK (which may contain malware). 2️⃣ You see fake “earnings” go up in the app. 3️⃣ When you try to withdraw, they demand a “network fee” or “minimum withdrawal” payment. 4️⃣ You send real crypto (TRX, BNB, etc.) to pay the fee. 5️⃣ The app disappears with your money.