I'm looking to import Redmi K30 Ultra, and since it is not available globally (only Chinese ROM), in the specs it is stated it does not support LTE B20(800). My operator provides following coverage:
4G -> B3(1800) and B20(800)
3G -> B1(2100) and B8(900)
2G -> B3(1800) and B8(900)
All other bands are supported by the mentioned device.
Now, I have some basic understanding about the topic, such as, lower frequencies means broader coverage but lower speeds and vice versa. But I am wondering if someone could tell me will I really notice the lack of B20 (e.g. will device be prone to losing 4G connection and going to 3G often). Are there any experiences regarding this problem (not necessarily with this phone). Thanks!