I have an unlocked Galaxy Note 8 I bought last week, I am having issues with it that I didn't have with my Galaxy S7 Edge before. I am just using the sim card that was in my S7E.
It seems that when the phone is on '4G' (or lower) the internet is unreliable and slow a lot of the time (not always), but on 4G+ it seems fine. Sometimes it will say 4G, with good signal, and it just won't load. Then suddenly it'll start loading things after a minute or two? What's going on here?
On my S7E it would be fine on both 4G and 4G+ (H was always an issue though).
I have tried resetting all network connections and inputting the APN settings for EE as per my S7E but no dice, it still seems to happen.
I have checked for reported issues in the locations I have been in, and for most of them there have been no issues. Also I can't imagine that it would be the case everywhere I am going (mainly around London).