I changed my physical SIM to eSIM

My spare phone which I use with China’s SIM card seems nearly to die, but my Pixel 9 (primary phone) only has one SIM slot, So I had to change japan’s SIM card to eSIM, then I can insert China’s SIM into my Pixel 9. By the way it has a lot of restrictions to use eSIM in China.

I thought it need install a special app, but all I need to do was scanning a QR code, It seems like it is supported by operating system. It likes a magic~