The most of TCP And UDP output port are closed in our WIFI network. The only way is for synchronize time of my android 6 in AndroidBox TV device is to be connected to our NTP time server. I tried ClocSync, NTPSync or Smart Times Sync with root access no issues.
All of these application are connecting well on the NTP server and showing the NTP time, but they didn't change the system time of the android device in my case. I noted I don't have any
/system/etc/gps.conf in my system too
Google play is impacted by this problem and I can not to be connect with it if the time is no good.
Thank for any help