Mobile data doesn't off

[AC Question]

I use Jio sim at LTE , but I noticed something , even after I turn Mobile Data OFF from settings , I am able to use Internet . What is this ? Can anyone help to explain .

 

[B. Diddy]

Welcome to Android Central! Are you connected to wi-fi? Do you have a dual-SIM phone?

 

[hrithikm]

Yup WiFi on and hav dual sim in Xperia m5 dual... If I insert only one sim then mobile data doesn't getting off in Android 6.0v update