If I use a smartphone with dual SIM, which data will be read on the Mobile Data Plan (MDP) page? | Telkomsel
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If I use a smartphone with dual SIM, which data will be read on the Mobile Data Plan (MDP) page?

The main data is always the operator data used in the SIM-1 slot, although the active network is SIM-2. The same applies to the case if using a different operator, the data that will be read is the operator data used in the SIM-1 slot.