no working for dual sim card

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2017-05-31 00:17

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Hi, i am using meizu note m2.
my phone come with dual sim card.
But when I apply two sim card to my phone, I just can choose either one sim card for function only,
can't get both sim card working in the same time.
mean that one sim card got line, the other one no service at all.
I was trying to reset my phone and upgrade the firmware to the newest,
but still same problem.
Can anyone tell me how to solve it or face the same problem with me?