How does Online Top Up work? To top up online, visit Online Top Up. Steps to use the service: Step 1. Register for free Step 2. Complete the Top Up details Step 3. Confirm the Order Summary Step 4. Payment Related articles How do I register for Online Top Up? What is Online Top Up? How will I know that the top up is successful? What are the steps to top up online? How and where can I do a SIM replacement?