1、 When the card holder is turned off, find the card holder on the upper left side of the phone, insert the card holder pin vertically into the small hole on the side of the card holder, and press hard to make the card holder pop out.
2、 Look at the text prompt of card type on the card holder: the internal card (also called card slot 1) only supports Nano SIM cards, and the external card (also called card slot 2) can hold Nano SIM cards or microSD cards.
3、 Insert the Nano SIM card and microSD card into the card holder in the indicated direction, and pay attention to the direction of the notch.
4、 Insert the mobile phone into the card holder and push the card holder back into the card holder. You can gently press down on the Nano SIM card or microSD card to prevent the card from being slightly jacked up by the contact spring during card insertion.