SIM card pin storage box

I changed my phone on Double 11 and wanted to find a place to store the SIM card and pin. The ones I found online were not ideal, so I made one myself. It is a box for Xiaomi's pin (Xiaomi's pin is larger than Apple's), and it is universal. The box closes well. I no longer worry about losing the pin.11.21 Updated lid files to have better closing performance.