I use 2 SIMs. The first for calling and the second for data. The problem is no matter what I do to limit the internet to one SIM I couldn't at all. For example, I did limit the date to 0 but by the end of each month I pay for data for both SIMs. The problem is the date in my country so expensive and I have to register to data plan otherwise I end by pay a lot of money. SAMSUNG that's not cool No data means "NO DATA." Software need to be fixed. Anyway, the meanwhile That's how I fixed it. connexions - mobile network - access point name - add - under "name" write (No Data) - ok - under "APN" write (0). Then choose it. Thank you.