Samsung Galaxy S9: when using cellular calling, the sound is cutting in and out for me, but the other person can hear me fine.

[s9user2021]

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

1. Restart

2. Toggle Airplane Mode

3. Install Carrier Updates

4. Install Device Updates

5. Clear Phone App Data

6. Reseat SIM Card

7. Reset Network Settings

8. Manually Select Network Modes

9. Run Safe Mode

10. Factory Reset

Any ideas would be greatly appreciated!

[GalaxyA51user]

Force stop and clear data of all apps with green dialer icon, as they are part of calling.