Step 1: Open JazzCash App and log in using your mobile number and MPIN.

Step 2: Navigate to "Pay Bills", select "Education", then "Entry Test" and "Sindh Testing Services Pakistan".

Step 3: Enter your Challan Number and press the "Continue" button.

Step 4: Verify Candidate Information, Challan Amount, review details, and tap "Pay Now".

Step 5: Receive confirmation via screen message, SMS, and STS system notification.