It is very simple to buy eBooks through your Mobile Operator.
Just click the ‘Buy’ button on the book you would like to purchase and select ‘Mobile Bill’ in the payment page. Your mobile operator should be automatically detected and shown. If not, please select the operator, enter the phone number, email address, and click ‘Pay Securely’. You will be sent a 4-digit OTP password to the phone number given. Enter the OTP password in the text box given and press ‘Submit’, to complete the payment.