https://www.ifixit.com/Guide/Huawei+Mate+10+Pro+SIM+Card+Tray+Replacement/122794
Huawei Mate 10 Pro SIM Card Tray Replacement - iFixit Repair Guide
Use this guide to remove the SIM card tray from your Mate 10 Pro.
huawei mate 10 prosim card tray replacementifixit repair