In a sentence: Samsung's Galaxy S10 5G is absolutely an early adopter's device that most people probably shouldn't buy if they want a long-term smartphone with 5G.
There's a lot to consider, research, and figure out to make sure you actually get 5G connectivity on Samsung's Galaxy S10 5G smartphone.
So far, with all these discrepancies and uncertainties around 5G's availability and compatibility with the Galaxy S10 5G, the phone seems to be more like an early adopter's device, as 5G networks are hardly fleshed out in the US in 2019.
Plus, the Galaxy S10 5G only supports millimeter wave 5G that may work in 2019, but 5G networks will evolve past the Galaxy S10 5G's compatibilities over the next year.
If you're looking for a long-term device that'll support more 5G networks, you'll have to wait for phones that come with Qualcomm's X55 model that supports sub-6GHz 5G networks and millimeter wave, which will start coming out later this year.
Apart from limited 5G, the Galaxy S10 5G does have some other perks that may interest new smartphone buyers.
For one, the Galaxy S10 5G has the largest screen at 6.7 inches on almost any smartphone. It'll also come with a super-fast 25W charger that's faster than Samsung's regular fast chargers that come with the Galaxy S10 phones. It also has a giant 4,500mAh battery. The Galaxy S10 5G also has a fourth 3D depth sensing camera lens for augmented AR applications and better live focusing on videos, if you're into those things.