We didn't get the SIM tray ejector pin with our review unit though. (pokde.net)
To insert a SIM on your device, push the SIM ejector pin in the hole, the SIM card tray pop's out. (phoneradar.com)
Inside the box (unboxing the Mi Note 3): Handset, user manual, SIM Tray ejector PIN, data cable (USB to USB Type C), 3.5 mm to USB Type C adapter (there is no 3.5 mm audio jack on this handset), silicon case and travel charger 12V / 1.5 A (fast charger) Body: Using Metal frame and back comes with mirror finishing. (gogi.in)