I have one question.

How to I buy games on Eshop ? My N3DS region was switched to UK, and planning to get AA5/PW5 in the future. So I test it to download a game from Eshop.

It requires a Zip Code and Country , I know I can't leave it blank. So I decide to put a zip code from google.

What does Zip code have to do ? is it for checking sales tax ?

Btw , I can't use credit card to buy because Uk's system N3DS only accept Uk's credit card.

Thanks a lot and yes I switch to Uk region.

I have one question now , Can I use another SD Card to keep my other games ?