On others, you might need to unscrew the ball/spike on the end. Traditional earrings with thinner wires or hooks work best. The right tool for the job might be closer than you think, as in on your body.
How to open SIM card tray with a Toothpick.How to open SIM card tray with a Safety Pin.How to open SIM card tray with a Thumbtack/staple.How to open SIM card tray with a Needle.How to open SIM card tray with a Paperclip.How to open SIM card tray with an Earring or piercing.