I've been using GrapheneOS on my Pixel 7 for the past two years without issues, but three days ago my mobile data suddenly stopped working. There's an exclamation mark on the GSM signal indicator, and I can't access the internet through mobile data (screenshot).
I tested my SIM card in another phone, and mobile data works fine there, so it doesn't seem to be an issue with my carrier. I also tried with changing Preferred network type, toggling Airplane mode on/off, rebooting my device but it didn't help.
Has anyone experienced a similar problem? Any suggestions on how to fix this?