Huawei MediaPad M2 Quick Start Manual page 6

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Card insertion

Use standard micro-SIM cards. SIM cards that are
manually cut or in a sleeve may damage the card
slots.

Do not insert or remove a SIM or microSD card while
your M2 is on.

With the card tray horizontal, make sure that the
beveled edge of the card is aligned with the card tray.
Store the card eject tool in a safe place out of
reach of children to prevent them from
swallowing it or injuring themselves by accident.
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