I'm experiencing that my Pixel 9a and my Pixel 8a disconnects during calls. I get a warning "turn off airplane mode to make a call" and the internet bar disappears and it takes about 30 seconds, before I can make a call again. Other times, the entire phone crashes/restarts during calls. I have no idea what causes this, but it only happens during calls. Initially I experienced it on a Pixel 8a thought it perhaps was a fault in that particular phone, but after buying a pixel 9a and experiencing exactly the same, I have to conclude that this is perhaps not the case. I have tried using a physical SIM card and an ESIM, both give the same result. Since this didn't happen on my older pixel 4a, and only when I bought the Pixel 8a, I tried disabling 5G, but this didn't help either.
Can anyone help me as how to diagnose this problem?