200 would be a struggle but doable for me. I average about 500mb a month, could get it down with more judicious use of wifi when about, our broadband comes with access to thousands of hotspots.
30mb for system services sounds quite good, but if you're worried as others have said turn off mobile data when not using it for a while.
30mb for system services sounds quite good, but if you're worried as others have said turn off mobile data when not using it for a while.