1st: This app doesn't have an option to add a credit card, UNLESS I purchased something first. Just then, I can save my credit card. 2nd: On the Yeezy drop, when I am picking my address. It always shows error, invalid address, etc. Even though my address is valid. ALSO it shows the error in different languages every time I try to select an address. THEN I found out that it's just my mobile no. that is not being accepted by this buggy app. So I tried with a different one and it works.