This started maybe in the past month or so.
When I call someone over cellular calling, the call sound cuts in and out a lot. Maybe 1 to 10 times per minutes. The interesting part is, the other person can hear me just fine.
When I use wifi calling, the call sounds great.
When I use google voice, which is data calling, the call sounds great.
I followed all the troubleshooting steps on this guide, and the sound still cuts in and out. I even did the factory reset. https://thedroidguy.com/how-to-fix-galaxy-s9-that-keeps-dropping-calls-troubleshooting-guide-1081791
Toggle Airplane Mode
Install Carrier Updates
Install Device Updates
Clear Phone App Data
Reseat SIM Card
Reset Network Settings
Manually Select Network Modes
Run Safe Mode
Any ideas would be greatly appreciated!