On the first day, SIM tray won't pop up. I know I placed a hand-cut nano-SIM as strictly prohibited. I sent it back to the manufacturer's repair center, before I mess up. The reply was just shocking, the repair costs more than I paid for the purchase! I may keep it as a Wi-Fi-only smart phone , or challenge to fix it by myself to damp as a garbage at worst.

Your video suggests to remove the card tray first. If it is mandated, I have no way to proceed. The stupid appreciates any suggestion to proceed. Thanks.