2019 is when 5G became accessible to the masses with introduction of midrange offerings that were 5G enabled. But there isn’t 1 standard for 5G as you shall see in this video.
[Video] Not All 5G Is The Same

Featured products
-
Redmi 14C (128GB, 4GB)
$105 -
Redmi 14C (128GB, 6GB)
$115 -
Redmi 14C (256GB, 8GB)
$130