If you want to buy a Xiaomi phone in the USA, there are some things you have to consider. First, you have to know whether it supports the carriers in the US. Secondly, some Xiaomi versions do not come with the play store pre-installed. Make sure to download it in case that happens. Lastly, ensure that it is a global version. You can buy a Xiaomi phone from the mi.com website, Amazon and eBay.