To get more credits, navigate to “load credit” and initiate the payment. All prices will be explained to you from the page. The more the number of credits, the less the cost. (N1000 will get you 500 credits, 2 Naira per SMS).
Logically if you could send like 500 SMS at the rate of 4 Naira for a customer, you will be earning 1000 Naira with your mobile phone, within the comfort of your home and without stress.