The Top Up feature allows you to top up:
Your mobile account
Your game credits
To use the Top Up feature:
Step 1: On your Home page, click on the ‘Top Up & eStore’ button.
Step 2: This will bring you to the Top Up & eStore page. Click either on ‘Mobile Top-Up’ or on ‘Game Credits Top-Up’, depending on which you one you would like to top up.