To activate the Cent Mobile App, you need to follow these steps: 1. Download and install the Cent Mobile App from your device's app store. 2. Open the app and select "Register." 3. Enter your account number, registered mobile number, and the requested details. 4. Set your MPIN (Mobile Personal Identification Number) for app access. 5. Authenticate your registration using the OTP (One-Time Password) sent to your registered mobile number. 6. Once authenticated, your Cent Mobile App will be activated.