https://mybroadband.co.za/news/cell...e-problems-on-samsung-smartphones-solved.html
It is LTE Advanced capable but Cellc network is just uhhmmm how can I say useless. Samsung approved the changes to have bandwidth requirements changed. There was an update but it did not fix the issue.
Cellc after my intense investigation said my S8 was connecting to LTE A but not showing it. I dispute this because they are refusing to provide me with proof that they claim they have.
As you can see from your speedtest above those are speeds from a Cellc congested LTE network. There is not many LTE A devices out there so I highly doubt that their LTE A can be so congested to give less than 10Mbps.