I have a Samsung Galaxy S4 and I'm currently on the basic phone plan with just talk and text with no data (Canada). I have the mobile data setting on my phone settings set to off, however I was charged for a data usage over a period of four days in my last billing cycle. I did receive a notifications on my phone that said something to the extent of "enable mobile network/connection", to which I always hit cancel. I'm unsure why this notification came up in the first place, but I'm assuming this had something to do with the charges. I'm very disappointed that I received these data charges when I try to take measures to ensure I'm not charged. If it was a service I intended to use, then I would be happy to pay for it, however I have never attempted to activate data on my phone.On a side note, I didn't realize that I could be charged for data on the plan I'm on since there is no data allowed. If someone would be able to remedy this issue, it would be appreciated!