I have just had a software update and the issue seems to have been fixed, I hope every one else gets the update pushed through to them asap
Mild resurrection of this thread, but I had success with changing the Access Point Name on my S10 Lite. I'm currently on a 3 (Hutchinson 3G) plan and was having trouble connecting to 4G and 4G+ (although my phone obviously doesn't have 5G) I added the APN available on the 3 website, with the exception of setting the IP version to IPv4 ONLY. this then allowed me to connect to all types of mobile network, 3G, H, H+, 4G and 4G+. Hope this helps some of you.
As a side note, H3G does support IPv6, however my phone doesn't seem to connect whenever it tries over IPv6, even when the APN Protocol is set to IPv4 and IPv6.
Thanks for the tip.I have an S20 Ultra and I had an issue with dropping signal. I tried everything and nothing worked. Your sugesstion worked. 2 days and no signal drop from 4g 4g+. This having mind that I had continous drops in signal. I was about to return the phone. Now I'm so happy. Thank a lot.