[LG V30 Questions & Answers] ChazzMatt:
You're driving me crazy. ;) US998 V30/V30+ is what you want. It doesn't matter where you buy it from or if you even buy another variant and CONVERT it to US998. But US998 V30/V30+ is what you want for what you describe. US998 is the also the ONLY North America variant with fastboot flash commands, which is why for WTF bootloader unlock/TWRP/ROOT for any North American carriers you have to convert the other carrier phone to US998. It's easier if you already have one -- that's one less step.

US998 is NOT a CDMA only phone, it's THE carrier unlocked phone for ALL carriers from LG. It has all the HSPA/LTE bands -- and yes CDMA bands -- of all the North American carriers. Because it IS the official carrier unlocked phone which can be used on any carrier.

http://www.lg.com/us/cell-phones/lg-US998-Unlocked-v30

US998

CDMA: 800 MHz CDMA

2G GSM: 850/900/1800/1900 MHz

3G UMTS(HSPA): 850/900/1900/2100 MHz

4G LTE Bands: 1/2/3/4/5/7/12(17)/13/20/25/66

Since U.S. Cellular is distant (and I mean very distant) 5th sized carrier in the U.S., LG does not make a dedicated variant for them like AT&T, Verizon, Sprint, T-mobile. LG lets this tiny carrier sell the carrier unlocked model and pretend it's their variant. ;) Then, a couple of months later,

LG sells the EXACT SAME PHONE as the "Open Market" carrier unlocked phone through authorized third party retailers like B&H Photo and Best Buy.

I bought three of these US998 from B&H Photo -- two V30 and one V30+, to use on AT&T.https://www.bhphotovideo.com/c/compare/LG_V30+_vs_LG_V30/BHitems/1379518-REG_1357369-REG

I later bought two "mint" Sprint LS998 V30+ off eBay, CONVERTED them to US998 and am using them on AT&T.

So, I've bought 5 of these phones -- either as original US998 or converted to US998 -- and they are all running on AT&T. The US998 IS THE CARRIER UNLOCKED MODEL FOR ALL OF NORTH AMERICA. Don't let the fact U.S. Cellular also sells it warp your brain. ;) Many entities sell the US998. Yes, when US998 sold by B&H Photo through LG, it's the "official" carrier unlocked model, but when sold by U.S. Cellular it's the "unofficial" carrier unlocked model. No difference, except the B&H Photo V30 are eligible for official bootloader unlock code (which we no longer need with WTF method).

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But even taking your question at face value -- have you bought a smartphone in the past 3 or 4 years? Even the "CDMA" carriers (Sprint and Verizon) phones also have GSM/HSPA/LTE bands. All Verizon "postpaid" (contract) phones since 2012 are carrier unlocked and have HSPA and some LTE bands of their competitors, because the FCC made them. Even the Sprint LS998 has most of the HSPA/LTE bands, for when Sprint occasionally does let you unlock the phone to use on other carriers. Even in 2014, people were using the Verizon Droid Turbo on AT&T and T-mobile. It was carrier unlocked (by order of FCC), and had the major AT&T/T-mobile GSM/HSPA/LTE bands.

See this website below for bands. For the US998 above, I am quoting directly from LG website. If you convert any other North America variant to the US998 you will have carrier unlocked phone with all those bands.

LG V30 Model Numbers (H930DS, H930K, H931, H933, V300 S/K/L, LS998, VS996, H930G, H930, VS996, H932, US998) Differences

https://www.techwalls.com/lg-v30-model-number-differences/

EDIT: Tech Walls has mostly correct specs, but good to compare. The US998 specs posted above are directly from LG website. Some phones may have more bands than listed on LG website, but you know they will have all bands listed on LG (manufacturer) website.

The North America phones UNLOCKED out of box are:

* US998,

* AS998 (basically same as US998, but sold by regional carriers)

* Canadian H933 and

* Verizon VS996.

BUT US998 is the ONLY one that also has fastboot flash commands.