To block your SBI credit card through the SBI mobile app: 

Step 1: Open the ‘SBI YONO’ app on your mobile and sign in with your MPIN. 

Step 2: Click on the ‘Accounts’ tab on the homepage. 

Step 3: Click on ‘My Credit Cards’ from the options available at the top of the screen. 

Step 4: Next, click on ‘Block Card’ option located at the bottom of the screen.

Step 5: Choose the card number you want to block and click submit.