Ok, so I upgrade my mi4c from 6.12.22 and now synchronization does't work. Sms and call history is empty although mi4c said all synchro. When I log to mi cloud via browser I see my sms and call history before upgrade - wtf?
Please tell me is on 8.0 stable battery works better? Battery in my mi4c works greats on v7. After update to v8 dev phone on idle lose battery very fast.
did you try to disable inteligent battery saving - I thing this could be it. I got the same problem.
Maybe is it problem only on your wifi at home? Then you should try to change channel of your wifi and forgot your wifi setting on your phone and connect again.