I'm relatively new to the GOS, got one running on a new Pixel 9. At first, it did not "see" the SIM card, but after one restart, it figured it out. I updated the system yesterday, and the problem has come back, but this time, no matter how many times I reboot, it does not solve anything. I have reset the network settings, but it did not help. Does anyone know what to do with it? The ability to call people is, indeed, a bit important. I have tried this SIM in my previous iPhone and it works.