Change Xiaomi Yi home camera language from Chinese to English. Also below steps will solve “This Camera Can Only Be Used Within China”
1. Reset your camera with pin
2. Format SD card. flash this firmware via sd card
http://www.xiaoyi.com/home/firmware/index_us.html?version=1

3. remove SD card. format it again. copy this firmware and flash it again
https://sites.google.com/a/mobileai…/…/file/1.8.6.1B.02.zip…
This firmware change language from Chinese to English.

Official Yi cam app for android
http://m.app.mi.com/detail/75646
Install YI Home APK in your Android smartphone. login via mi account