How do I insert a SIM card into the Infinix X6512 Smart 6 HD?

First, power off the mobile phone before inserting the SIM card. Use the provided SIM-eject tool to pop open the SIM tray by inserting it into the hole beside the tray, then insert the SIM card into the SIM card slot and push the tray back into place. Refer to the SIM/SD card installation diagram in the manual for guidance. (Page 3)