How to install SIM / USIM card on Galaxy A8 and A8+?

Note: Insert the SIM or USIM card provided by the mobile telephone service provider. Use caution not to lose or let others use the SIM or USIM card. Samsung is not responsible for any damages or inconveniences caused by lost or stolen cards.

Ensure that the ejection pin is perpendicular to the hole. Otherwise, the device may be damaged.

Use only a nano-SIM card.

If the card is not fixed firmly into the tray, the SIM card may leave or fall out of the tray. 

If you insert the tray into your device while the tray is wet, your device may be damaged. Always make sure the tray is dry. Fully insert the tray into the tray slot to prevent liquid from entering your device.