LG V30 - a device I regretted buying right after I got it. When I got it, the display had already developed a severe burn-in, the battery barely lasts a day, and the back glass is cracked. All of them were eventually replaced, although at the cost of the fingerprint scanner not having enough clearance to connect to its pins & work (it was eventually fixed by sticking a stack of electrical tapes; but I eventually got another fingerprint scanner complete with its sticky bracket, which I still had to boost by 1 stack of electrical tape).
Summary : Mostly breaks the mold of bootloader vs. hardware, but pays for it by not having any form of storage encryption on custom ROMs. Oh yeah - spare parts for the V30 seems to be quite scarce (especially the decent one) nowadays.
Thin & light will be the first thing that comes in mind when holding the V30.
The V30 has a bottom loudspeaker & a headphone jack. The earpiece can also double as a second speaker by modifying mixer_paths_tavil, though the earpiece itself is too weak to matter.
The speaker quality is lousy - it lacks volume & sounds somewhat tinny. As previously mentioned, the earpiece is helpless for second speaker purposes.
The headphone jack quality is better than most, with audio quality being louder than most others. The Quad DAC also helps, but enabling this in AOSP ROMs enable an annoying screen off swipe controls that can't be turned off. The screen-off swipe controls aren't enabled on ≥A10 ROMs.
Additional notes for the Quad DAC : Enabling it makes music sound better & louder, but will introduce some background noise, which gets more noticeable at louder volumes and/or weaker headphones.
The 6.0' 18:9 pOLED is a decent & workable display, as far as I'm concerned. Though, turned-off blacks are the thing that I truly like from OLED panels; which this panel won't offer if it's not a perfect black (sometimes there's black crush, particularly on lower brightness levels).
What I dislike about the panel though, is the fact that it's an OLED. Over time, it will develop burn-in. That, when combined with Fate/GO's blue bars (or any static element such as the top & bottom bars), is a burn-in incident waiting to eventually happen. This issue can be somewhat mitigated with Smart Pixels, if the ROMs provide it.
The bootloader unlocking process is quite involved, depending on the variant you got. On the H932, it is going to be harder.
For non-H932 (everything else), use the WTF method (archive.org). H932 (T-Mobile) can use fastboot oem unlock, but lacks fastboot flash/boot commands, complicating TWRP installations without using the lafsploit (archive.org) method which is significantly harder & riskier.
If you opt for the official method (which is no longer applicable), it's only available for EU variants. US998 is also available, though it requires hacking the drop-down menu. Hence, the official method is not the ideal method (although you're not required to downgrade & do a master reset).
In terms of repairability, it's in line with most glass-backed phones, except with one rather annoying twist - the contact pads, particularly for the fingerprint scanner. OK - there's one good twist - those antenna cables can be considered absent since they attach to the undersides of the motherboard, under the board.
Teardown references :
Custom ROMs for the V30 is not good.
For custom recovery, there's only unofficial TWRP, maintained by the same person who maintains official LineageOS for the V30. Sure, there's some old builds of TWRP & OrangeFox around, but previously mentioned unofficial worked with older ROMs as well, so I might as well not mention those.
As for custom kernels... don't bother, the V30's kernel development is over at this point. There was a KSU-capable kernel, but only for A14.
Let's start out with the bad ones :
Then move on to the questionably good one :
And, finally, the actually good ones that I don't really give a fuck :
All things considered, the only thing I can recommend the V30 for is as some offline music player. And that's only if you kept your own V30 around in the first place, because I can not recommend getting it in any way.