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Such as better battery life or something.

im using iPhone X
Realistically speaking 4G is LTE (in general and in most parts of the world). In US at least some carriers, especially in relation to the iPhone, have taken 4G to be somewhat different applying it to what's more along the lines of 3.5G (and not LTE).
 
Realistically speaking 4G is LTE (in general and in most parts of the world). In US at least some carriers, especially in relation to the iPhone, have taken 4G to be somewhat different applying it to what's more along the lines of 3.5G (and not LTE).

Ok I mean I have att so I think it’s 3.5G

So is there any benefit at all
 
4G and LTE technically should be the same thing, however when true 4G (LTE) started to roll out some carriers (especially in North America) were already referring to their fastest 3G networks (HSPA+) as 4G so true 4G became known as LTE. On newer iPhones (including your X) there is really no advantage to using older (and slower) 3G/4G as it will just mean it will take longer to load things and your cellular modem will be in a higher power state for longer ultimately consuming more power.
 
LTE consumes more power, but the data is faster so the extra power used for a shorter duration.
 
I tried using HSPA+ for a week and I had worse battery life. As mentioned already, the modem has to stay in a high power state for a longer time since the data transfer rate it low.. it will take longer to transfer data. When using LTE the data transfer time is much shorter so the phone can put the modem into "low power state" faster.

When LTE first launched and I had an iPhone 5 it got bad battery life on LTE compared to HSPA, this was because there wasn't many LTE sites around so the phone was constantly searching for LTE towers. However now there is LTE everywhere so there is no need to disable LTE and use HSPA+.
 
Cool so basically the consensus is there’s really no reason at all to use 4G instead of LTE on a carrier like ATT.

I suppose the only exception then would be is if LTE was low in signal then I’m guessing it would be more prudent to switch but then again the phone automatically does that I think. I saw 4G earlier today on my iPhone X and my guess is because LTE signal was too low
 
Cool so basically the consensus is there’s really no reason at all to use 4G instead of LTE on a carrier like ATT.

I suppose the only exception then would be is if LTE was low in signal then I’m guessing it would be more prudent to switch but then again the phone automatically does that I think. I saw 4G earlier today on my iPhone X and my guess is because LTE signal was too low
Or situations like the one mentioned earlier:
I use 4G when I’m in a super crowded area that’s heavily concentrated like a ballgame. Usually works when LTE won’t.
 
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