S24+ Owner here, I bought the phone via my network service provider less than a month ago. 
I use the phone a lot for internet calling (Teams meetings, whatsapp calling etc) 

Experiencing the problem where the signal says "5G" or "4G+" etc., but no internet connection.

This happens randomly during the day 10-15 times... and I've tried all the tricks I could find online... the problem persists.
My data plan is unlimited, I have no data limit set in the settings. 
Tried resetting network settings & APN settings multiple times.  

I can imagine it's less visible when you stream videos etc. because of the data buffer.. but if you make internet calls (Whatsap, teams, etc.) it really gets on your nerves.

I am a  long time samsung/android products user.. I have not expected to face this issue with samsung. 

Please help.