iPhone Hates Vietnam

Playing around with an OTB iPhone (that would be an out-of-the-box for the acronym challenged), I discovered that when you enter a contact on the phone, you cannot choose Vietnam as the country location of your contact.

You have Indonesia and Singapore, but not other ASEAN countries, such as Thailand.  I guess the same is true for South America, where you are limited to Mexico (which is in North America), Argentina and Brazil.  

I understand that the phones are not meant to be supported in these omitted countries, but this omission means that Apple doesn't think you should have friends in these countries either.  

There are hacks to fix this, I am sure, but it should be standard.  Good thing for me, I'm a xenophobe.