Samsung

I thik , there will be a option for use of dual apps for all apps. it is only available for facebook, whats app and other messengers.

Facebook app doesn't open since 8 pm .is this happening to your device also?

In my device (j7 nxt) , when sim1 is 4g and sim2 is 3g , then i can not connect to internet via sim2 in 3g connection. when i change the data connection to sim2 it change to 4g sim1 goes to 3g. There should have a option to turn on mobile data connec...