No I am not sure but my understanding is that 99% of Dual Sim card phones are Dual Stand By today, not Dual Active. You may want to research that and post back your findings. If it is Dual Active I am really interested but then why would Samsung not brag about it. It is the holy grail. Everybody would want that capability in their phone. Here in the US I would have to buy an international version of the phone. Right now I have to carry 2 cell phones. As they get bigger and bigger it gets more inconvenient.
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