[LG V35 Questions & Answers] ChazzMatt:
I'm not sure what your question is.

Are you asking about bootloader unlock and rooting the V35?

Are you asking about SIM card unlocking the V35?

First, understand it's clear they have no idea what they're talking about. If you look at their instructions for rooting the v30 it's ridiculous, therefore why would they know anything about rooting the v35?

Second,
"Power off with volume up and plug in USB cable" is what gets you into Download Mode.

You're asking in the V30 forum, so for right now I'll give you "V30" answers and then we can discuss the V35 (which is a completely different phone).

On the V30 we use that in conjunction with dev patched LGUP to convert (Frankenstein) to another variant firmware -- either

to SIM card unlock a phone, like the Sprint LS998 or as

one of the steps to get a variant with fastboot flash commands for bootloader unlock.

Or after bootloader unlock and root, Verizon users can flash back everything in the VS996 EXCEPT for TWRP recovery, and thus turn their phones back into a Verizon VS996 while still keeping unlocked bootloader, TWRP (and ability to root). They even lose the annoying bootloader unlock warning.

So, Download mode is tool for SIM card unlock. But you also need dev patched LGUP, you need ANOTHER KDZ to flash to. It's

called Frankenstein.

Then, for bootloader unlock and root for all non-US998 North American variants (except for T-mobile H932) you not only need dev patched LGUP, and another KDZ to flash to (with fastboot flash commands), you also need the wonderful pre-July 2018 Oreo bootloader unlock exploit, which [MENTION=6158380]TxanMoe[/MENTION] discovered -- which we use in the

WTF method.

V30 variants which already have fastboot flash commands (US998, H930, H930DS) but are on firmware higher than pre-July 2018 security updates would use Download Mode to downgrade to earlier firmware. Again, you need dev patched LGUP, and another KDZ to flash to.

So, Download Mode is not some "magical" tool that does something for you. That's like saying only need a HAMMER to build a house. Well, you do need a hammer... But you need nails, you need wood, you need a saw...

V35

For the V35, you would also need dev patched LGUP that would work with the V35. [MENTION=5012130]padmanek[/MENTION] gave us ours for the V30 and I give him credit every time I post it. Somebody would need to make one for the V35. Do you have another V35 KDZ to flash to? This would be for SIM card unlock, so you would need a carrier unlocked KDZ.

For bootloader unlock, assuming the V35 had the same Oreo bootloader unlock exploit (a big assumption), you would need a pre-July security update KDZ for carrier unlocked KDZ (which hopefully would have fastboot flash commands). The

ONLY KDZ I see for the V35 has a July 17 date on it

, which presumably means it has July security update. EXPLOIT PATCHED.

THEN, if you did somehow unlock the bootloader, what are you going to do after that? You can't install TWRP, as there's no TWRP for V35 (JUDYP). TWRP for the V30 (JOAN) won't work for JUDYP. You can't flash Magisk (root), because you don't have TWRP.

This blog you got all this from is full of crap. They take stuff for other phones like the V30 and say "this is how you do it". Or they say there's some magical "one click root". You can't believe them. V35 doesn't even have their own forum on XDA.