Most of Huawei's phones are dual-SIM designs. Card slot 1 (inside) supports Nano-SIM cards, and card slot 2 (outside) supports either microSD cards or Nano-SIM cards. Insert a card as follows:;
1, long press the power button, select shutdown.
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2. Insert the randomly distributed card needle into the small hole on the side of the card and push out the card.
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3. Insert Nano SIM card or microSD card into the card.
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4. Insert the Cato back into the phone in the direction taken out. ; Please use a standard Nano SIM card, inserting a non-standard card may cause damage to the SIM card holder.