I've been dealing with this problem for months now since I got the s20+,  and have done all the requested attempts of rebooting phone, wifi, etc and nothing worked.  I think I just figured out the problem as my phone had been working and not dropping the internet anymore. I found it by accident.  Pull down the the screen to access the settings and select power mode. Uncheck limit CPU to 70% and accept. I'm sure it'll decrease the life of my charge, but so much better than constantly getting booted off my wifi, not to mention at work where I rely on being on wifi.  FINALLY!! I hope this works for others and that's why I had to share!!     ... View more