Ok so I just tested the following.
2 bulbs, 3 strips, 5 switches, 2 temperature sensors, 4 smart sockets, 3 windows/doors sensors, the robot cleaner and a security camera and obviously the gateway on the Chinese Server.
I reset the gateway (it's the gateway 2, this one.
I switched over Singapore server.
I imagined I would get a popup to automatically add the gateway. Nothing happened.
I tried to manually add the gateway by selecting Mi Control Hub.
Phone scanned and found nothing.
I connected the phone straight to the Gateway's wifi. Still not found.
I repeated these steps 5 times with no luck.
I switched back to china server and I got the automatic popup to add the gateway. Apparently the gateway 2 is not supported yet on Singapore? Mhh. Well I tought I could leverage cache so:
I did not add the gateway to the chinese server.
I quickly switched over singapore server.
I could see the gateway and I also got the message to add it.
I tried then it failed.
I tried 5 times and could not get past this step.
I tried with Hong Kong, USA and Europe server as well. I also tried by creating a mi home account.
In 1h my GF will be back and I'll steal her iPhone to see if it's device related.