How does S6 Edge connect to the internet when Wifi and Mobile Data are off??

[AC Question]

Hi guys, ]

something really weird happened today with my brand new S6 Edge.. I have not inserted yet the SIM card and have also disconnected from the Wifi some time ago. I came back from work and saw that somehow it still managed to update my chats and to show emails and Insta newsfeed. Is it some sort of a new feature I am not aware of, only my GPS was on...haha??

Regards,

Atanas