LG G3 D855 Issue with Upgrading from Lollipop to Marshmallow - G3 Q&A, Help & Troubleshooting

Hi Team,
I tried upgrading my LG G3 from Lollipop to Marshmallow using the KDZ file. I installed this using the LGFlash tool.
I successfully installed marshmallow on my LG G3 but then i noticed that videos from FB and Youtube are not playing, same goes with music on spotify(data and wifi are working). My workaround on this is to restart the phone and everything goes back to normal but for short period of time only.
I tried reinstalling the KDZ file and restore factory settings and still encountering this issue.
Your help is greatly appreciated. Thanks!
Phone Details:LG G3 D855
Software Version: V30b-GLOBAL-COM
Build Number: MRA58K

You could flash fulmics 6.6/6.7. Everything works fine on that. It's basically stock.

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Hi there guys i bought the sprint g2 quite a while ago and have been dangling with roms for quite some time on it the problem that i'm sharing with you guys arised today.
I flashed the newest version of Resurrection Remix 5.4.6 on it and while it worked buttery smooth it had no sound whatsoever and couldn't auto-rotate so i flashed the lp baseband and zv8 modem on it to see if it remedies that, no solution, so i reverted it back to 5.4.5 with my nand backup, it worked fine until i found out i couldn't d2w when it was working flawlessly before so i flashed(foolishly) the kitkat baseband and this leads me to the problem i'm sharing with you people.
My phone is now stuck in a bootloop restarting to the lg screen again and again, giving me a secure boot error on download mode so i can't use the .tot and .dll stock files on it and i can't seem to get into hard factory reset so i can just get into twrp and flash the lp baseband again and relieve me of this nightmare it also gives me multiple windows drives with one accessible one with an image folder when i go to download mode
[EDIT] fixed it somehow got into recovery and flashed the lp modem, can a mod close this?

I am on stock V30b and I experience slowness and reboots, model: D855 2GB, not rooted

I am on Android 6.0 stock (V30b) because CyanogenMod was so slow after awhile, so I thought it was CyanogenMods problem. So as soon as an official LG G3 rom of Android 6.0 was out, I jumped into. But now I have the same behaviour. It is slow! Sometimes when I type, it takes a while for the phone to catchup. Also when I am on the phone with someone and then I switch apps into something, the phone might reboot.
Is there something I can do? phone is not rooted! Or maybe it is the fault of Android 6.0?
Did you flash kdz?
Sent from my LG-D855 using Tapatalk

No data/wifi after wipe, can't get past initial setup.

Model: H815
Bootloader: Unlocked
Software: 10b (coming from 20d)
Rooted: No
Hello. I was downgrading from MM to LP using lgup. The phone got stuck at the logo so I performed a factory reset. Now I'm at the setup screen but my mobile data and wifi aren't working, so It won't let me proceed to setup my phone. The wifi not working is nothing new, but I've performed resets before and never lost mobile data. I do have a backup on the SD card and on the PC. Any help would be greatly appreciated, Thanks.
Flashed LP compatible modem/radio as well?
First of all, thank you for the reply. I just flashed a KDZ. I didn't have any radio issues when going from LP to MM so I assumed there wouldn't be an issue going back. Now that I think about it, I went to MM with a .zip that had everything.
I was messing with LGUP and I saw the "FOTA" option allows .zips. Could I flash a "complete" package and have everything be compatible?

LG G3 firmware, root, and sd card problem

Hello, i follow this forum for some time now, and until yesterday i had no problem installing, reinstalling Android phones. But yesterday i tried install stock Android on LG G3 D855 and had no luck, KDZ and TOT systems will not install 4.4.2 on G3. Currently this phone have v30n android with suffix:A6PSTN but i think actually is 6PS. Reason i want to try install stock system is that because SD card do not work properly on THIS phone. Card will not work at all or it will stuck formatting around 20%...any help is appreciated...thanks
Mine did the same. It appeared to be a hardware issue. https://github.com/relan/exfat/issues/49 though please note this occurred on my samsung s5
Sent from my SM-G900I using XDA-Developers mobile app

LG G3 restarting all the time

Hello everyone. I have the LG G3 model D855 running Android 6.0 and and phone keeps restarting all the time.
Things i've done until now:
1) replaced the battery with another G3, i still have the restart issue and the other phone that uses my battery has non.
2) did a factory reset and upgraded the android software from 5.3 to 6.0.
3) From LG PC Suite i did "Restore Upgrade Errors".
4) Using Android studio i looked at the logs from the LogCat and found nothing special. i saved logs from two different restarts and tried to see if there's anything in common but still nothing.
I have no idea what else to do and it looks like an hardware issue.
If someone has an idea it will be very appreciated.
Thank you very much.

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