Credit tab displays resent credit transfers and available credit for any user account.
Click on add more credits to add credit to the user account. You can transfer credits to various service like SMS/voice depending upon the type of service the user has opted for.
once you click on add more credit, a pop up appears with following options.
1)Credit type>Select the desired service for which you want to add the credits.
2)Payment reference >Enter details of your payment for future reference.
3)Add credits>Enter number of credits/currency.