There is already a pre-rooted stock Marshmallow that can be flashed. I personally tested it and inspected the files within it and it looks pristine ("untouched", except for it being pre-rooted). That is the easiest way so far.
If you do not trust that download, you will have to learn how to pre-root it yourselves (of course a little more difficult than just flashing it, but at least you're assured that it's "pristine"). There have been guides (posts) on how to do it. I have tried both methods (flashing the pre-rooted, and pre-rooting a pristine copy of Marshmallow myself).
I have not used the "Kingroot" method. I don't trust it. That's just me. (and let's not debate about it as it's off-topic)
I dissagree about the recent posts about the root method causing the reboots though and that the rooting methods available are originally for the D856. Actually, the D856 and D858HK use the same kernel source code (you can verify it from LG's Open Source website). The only difference between the D856 and D858HK are the networks supported.
Hey man, I actually wasn't claiming it was true about the D856 image causing problems for D858HK when rooting...Just that at some point I read it as an explanation. I've had this problem on the original rom that was installed on my phone. I had the problem with Aroma and with Carbon which I am currently on. I also have gotten random reboots (both when using an application, any really, and when the phone has just been sitting around for hours). It seems almost like a hardware issue to me, to be honest. But I read people mentioning the root method as being the cause, so I'm not really sure. Regardless, I'm not sure any amount of speculating, agreeing, or disagreeing will actually solve the problem. It is what it is.
You mentioned a pre-rooted MM for D858HK. Is that on XDA or external? If on XDA, I'm not sure I can find it and was hoping you could like to it! Edit: were you talking about this? http://forum.xda-developers.com/lg-g3/general/lg-g3-d858hk-discussions-t2941114/post64696292#post64696292
Also, on a slight tangent. If we have MM and pre-rooted (or pre-rootable by ourselves) abilities... why am I still seeing no custom roms for D858HK? Perhaps I missed them, but I check ever couple weeks and am only seeing them for the other commoner varients.
Oh yes, you're correct. I confused myself because I was thinking about Kitkat being my first rom earlier and I think the thought crept into my writing accidentally. Funny how you type seemingly random (but understandable) things sometimes!
I know what you mean about small percentage of users. I didn't even consider that when buying the phone, unfortunately. I wanted the dual sim because of lots of traveling between two places and didn't want to be constantly opening it up to switch sims. Turns out I should have just that anyway, with the random reboot problems requiring the battery be completely remove + reinserted (for my phone at least). Hindsight... plus I'm happy enough with it.
Thanks for the tip on where to search. I'll take a look and probably stop by to include a link for others a bit later.
Any chance for root on this device? I read that russian forum but the links got removed. I tried with kingroot but no success. I just want root so i can install google phone app, google camera and maybe find a way to install the lockscreen as well. I just want to be as close to nexus because my n5 became sluggish. Thanks
Phone and Messaging apps with "dual" button for 858НК_30аMy feedback:
Worked fine so far (tried for a week). I personally feel it's better than the stock firmware (Marshmallow) as the Phone and Messaging apps retained the "dual" buttons when making a call or sending SMS. The stock/official Marshmallow firmware no longer retained this feature (that was already there during Lollipop/Kitkat). You will have to "switch SIM" whenever you want to change the SIM card to use for calling/texting.
Plus: if you are coming from Lollipop which you already have (presumably) rooted, with Busybox, and TWRP-installed, you get to retain them.