nope there isn't anyway to do that ! It is there for your own benefit look what happens some times a person unknowingly clicks on the mobile data without having any data plan active and he/she ended up with long bills. But still its case specific because not all vendors gives such option As far as samsung touch wiz is concerned I am not seeing any notification while switch the data connection on and off I'll say while the notification is popping up on the bottom of the notification there might be a check box showing don't show this notification again, try checking that box and again try switching the notification on and off.