To log in to the Central Bank of India mobile app, follow these steps: 1. Launch the Cent Mobile App on your device. 2. Enter your registered mobile number and MPIN. 3. Tap on the "Login" button to access your account. 4. You may be required to authenticate your login with an OTP sent to your registered mobile number. 5. Upon successful verification, you will be logged in to your Central Bank of India mobile app.