The time zone is not correct.

Question

The time zone is currently uneditable and default to China time. 

Answer 1

1.Set the Date&time manuallly in the settings-system-Date&time.Turn off the "Automatic date&time" and  "Automatic time zone" switches.

2.In the automatic date&time mode,turn on the wifi（maybe time synchronization is slow）,can insert the SIM card  and the time which will be synchronized quickly.