This is specific to certain variants of the s5 and s6. It wouldn't surprise me if att does it again here.
You can probably add it back using the quickpanel Manager from the play store, I believe that that worked for the s6/note 5.
If you can't add it then you can use a third party widget in the notification panel. Certainly not as clean as a stock toggle, but hey... Would save you a few steps.I hope not. :-\
I couldn't add it on s5.
Posted from Android Central
If you can't add it then you can use a third party widget in the notification panel. Certainly not as clean as a stock toggle, but hey... Would save you a few steps.
So I can't imagine Samsung is "blocking" turning off data. However I visited Best Buy to play with it...and couldn't find it. I toggle my data on an off a lot especially when I am out of the country. Making it a chore would not be pleasant.