Mobile network is not working

"I'm using One UI 8 Beta 2, and ever since the update, I haven't been able to make calls. Even though I have signal and can access 4G and 5G data, calling someone takes 10 to 30 seconds before showing 'Mobile network not found'." I’ve tried the following fixes, but none have resolved the issue: Manually selected my mobile network Toggled Airplane mode on and off Reset network settings