Their email support is Malaysia even though there is Singapore email.
I emailed to the singapore xiaomi email address and the reply came from malaysia.
When I was at xiaomi suntec, I asked why the customer service guy at clarke quay look so nua nua and lazy, hide inside the dark room play phone until got customer come. Also whenever I called the customer service hotline is nobody answer one.
The xiaomi suntec staff just laughed and say the customer service number listed on the website for clarke quay was invalid since awhile ago. No one would be able to call in to ask about any technical issues about their phones. Hence the suntec sales branch always kena technical or customer support phone enquiries.