I have read multiple threads on tons of different things to try to get my new Note20 to send texts (both sms and mms) over WiFi and have no such luck. My iphone 8 worked perfectly fine and at this point wishing I stuck iphone. I got myself and my fiance these phones as we were told wifi messaging would work as I work at a data center where there's no cell phone signal at all.
Please someone fr samsung or anyone with information help. My fiance is pregnant and I need means of communication..
I'm sorry to hear about your situation with galaxy Note20. When it comes down to SMS not sending or receiving make sure that it is not a connection issue. If you can find suitable wifi connection than make sure it's not an application issue.
Application issue fix:
1. Clear App. data 2. Soft Reset device ( Power and "Restart") 3. Relaunch App.