Step 2, Launch it, click "no" when asked "do you already have an account?" and then it will jump to a landing page for you to create your own account, then start to create your account, click "use for free" and then click "have a voucher", and paste the voucher code into the box.
Voucher Code: 50GBFREE
(Valid before November 28th, 2016) (2016³â 11¿ù 28ÀϱîÁö À¯È¿ÇÔ)
Step 3, Open the application, click "yes" when asked "do you already have an account", then login in with your account. Now enjoy the enhanced account with 50GB data.