[LG V30 Questions & Answers] Septfox:
The site is absolutely correct. It

may

work....in a very limited fashion.

Carriers don't deploy every frequency at every tower, partly for practicality reasons (e.g. out in the middle of nowhere it makes most sense to use CDMA+band 26 to eke the most range possible out of the tower and adding more radios to the tower is a waste of money) and partly licensing (they may own band 25 in one area but not another).

You might very well have a band 41 tower near your house, and it would appear to work properly (maybe even with VoLTE, if Sprint has that and the T-Mobile ROM will connect it). But if you head to work, and the tower nearest there only has band 25, then you're SOL; technically there's "Sprint" coverage, just not what your extremely limited cross-compatibility needs.

When [MENTION=3250376]ChazzMatt[/MENTION] was saying that you'll need CDMA for some stuff, it's because carrier models tend to only support their own VoLTE implementation out of the box, and need some work to get it working otherwise. It may not work at all without running the Sprint ROM; same with wifi calling if Sprint supports that.

Without those two, you'll have no voice and texting services, because those are what the CDMA connection is for. Without VoLTE, your LTE band is strictly data-only (though you COULD use IM and voice apps like Google Voice, since those use a data connection).

I think CDMA carriers are still running whitelists anyway, regardless of what the phone supports --- and Sprint is probably taking it a step further by only allowing Sprint and (possibly) Unlocked phones.

Because of the whitelist BS, you ideally need a Sprint model (as the whitelist goes by IMEI, not what software is flashed, although non-Sprint software may have issues with the initial activation so do that before flashing anything). If you're on Sprint itself rather than an MVNO, you might be able to get away with just swapping the SIM into a CDMA-capable phone, but it really depends on how the network is set up.

To summarize:

Because it only supports one band (a data-only band, even), your coverage will be extremely limited

In the same vein as above, unless you can get either VoLTE working over that single band, or wifi calling to connect, you'll have no native voice/text services due to lack of CDMA

Sprint will absolutely not freshly activate a non-Sprint (as indicated by IMEI) phone on their network, maybe not the unlocked US998 model either (however this probably won't stop you from swapping your SIM in)

Ideal course of action is to return your H932 (and eat any return cost, unfortunately...), obtain an LS998, get it activated, then flash whatever ROM you like (if desired)

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If you're curious as to why anyone would want an H932, given it being harder to unlock and root and being limited strictly to T-Mobile bands: it's the only model that supports band 71, TMO's new-in-2017 long-range band --- the US998 both lacks the band out of the box and is unable to activate it in software for whatever reason.

At a guess, this was due to an exclusivity agreement between LG and TMO in order to sell more carrier models...which is utterly moronic because b71 support was nearly useless in Q4 2017 (barely any sites deployed). But hey, what do I know, I'm just a random consumer and certainly don't know better than LG's fantastic marketing department.

(that last bit was sarcasm, if it wasn't obvious, LG's marketing is a joke/worst-in-industry)