How to Convert your LG G3 into LG G5 with Marshmallow! [Fulmics ROM]


Everyone has been literally raving about this new ROM that converts your LG G3 into LG G5.  Yes, that ROM is called the Fulmics ROM.

Ported from LG G5, you will get to enjoy the all-new LG UX 5.0 and apps from LG G5, converting your G3 into G5 as far as everything goes with the software.  Of course, anything that requires actual G5 hardware is not possible such as fingerprint sensor or camera.


(Launcher settings are identical!)


(Settings UI is also identical but it’s missing Always On screen option, the only feature this ROM doesn’t have yet.)

Based on latest Android 6.0 Marshmallow, you will also get to enjoy all the latest upgrades of Marshmallow including DOZE, app permissions, and much more.

But it doesn’t stop there, Fulmics ROM come with full support for root (yes it comes with root) along with a slew of customizations you will enjoy, which essentially makes it better than real LG G5.


(Status bar customization)


(Navigation bar customization)

With Fulmics Tweaks, you will be able to fully tweak your display, status bar, navigation buttons, lockscreen, volume buttons, and much more just like AOSP CM13 ROMs.  You do also get some great options like Viper4Android and Xposed working out of the box.

Inside, Fulmics Hub,  you will be able to get extra themes for your keyboards, add-ons, and fixes.  Make sure you flash the Camera Fix and Netflix Fix otherwise your camera or Netflix will not work!  (You can flash using TWRP, just flash no wipe needed.)



(Installation screen shows support for all LG G3 models!)

Best of all, this Fulmics ROM supports virtually all models of LG G3 including AT&T D850, T-Mobile D851, Canadian D852, international D855, Sprint LS990, U.S. Cellular US990, Verizon VS985, and even all the Korean models F400S/K/L.


LG G3 w/ Android 6.0 Marshmallow Antutu Score: 56,071

This ROM will give you a beastly performance, I got 56,071 on Antutu benchmark test, which is unreal for an LG G3!  Besides benchmark numbers, the ROM runs super fast!

Overall, this is an excellent Marshmallow ROM that will give you latest LG G5 software features, Android 6.0 Marshmallow, root, and customization.  So definitely give this ROM a go this week(end) and do let me know what you think!


Download Fulmics ROM for LG G3 (for all models of LG G3 including AT&T D850, T-Mobile D851, Canadian D852, international D855, Sprint LS990, U.S. Cellular US990, Verizon VS985, and the Korean models F400S/K/L)

No Gapps required for this ROM!

ROM Installation Instructions:

Please see our FAILPROOF method on installing Android 6.0 Marshmallow ROM using TWRP! And also PLEASE make a backup ROM beforehand, see our backup ROM guide for TWRP recovery.

Credits – XDA <— Please donate to the developers of these ROM or hit Thanks button on XDA if you like it, thx!


Q: My 3G/4G LTE data is not working!!!
A: See How to Fix 3G/4G LTE data by Manually Setting APN on Android!

Q: I have no Play Store!
A: Make sure you install Gapps zip file in TWRP Recovery!!!  Download link in this post above.

(To fix camera, download the camera fix in Fulmics Hub app and flash with TWRP!)


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48 Responses

  1. Robert Twigg says:

    How does Fulmics 5.0 compare to Cyanogenmod 13.0?

    • Simon says:

      It’s better, much more stable and actually faster, against all my expectations. The biggest boost is in battery life though, I get at least an hour more of SOT.

  2. Zaid says:

    Is this room work with lg-d856 ?

  3. Ian Tuite says:


    You say on your site above, that “No Gapps required for this ROM!”
    but further on down it says ‘if you don’t have Google Play Store’ to download it from ‘the post above’.
    ???? I don’t see it.
    Do you mean the Google Play Store fix is in the ‘3G/4G LTE Fix’ post ??

  4. R says:

    Can i install this rom directly from 4.4.2 kitkat rooted?

  5. W. Walker says:

    I am trying this on Sprint LG Flex 2. Android 5.1.1 – LS996ZV9. After rebooting it hangs on 0% updating firmware. What do I need to do?

  6. Little Red Hawk says:

    Bluetooth not working – is there a special fix?
    Great ROM, was running jit kat 4.4.2. with full root – AnTuTu = ks Maxna25,483
    AFTER Fulmics G3 to G5 – AnTuTu = 51,008 !!
    PS ( i get HIGH on andriod 😉
    Thanks Max – u ROCK

    • Little Red Hawk says:

      …well…since i love my bluetooth, looks like a deal breaker for Fulmics for now.
      ?? SO, how do i get my g3 back to kitkat 4.4.2 , rooted???
      i imagine i have to backup and flash back to stock with flash tool? or there a more simple way?

      • A helper says:

        There is a Bluetooth zip that you can flash if it’s not working, look it up (Tekcafe marshmallow bluetooth fix)

  7. ry says:

    hi guys
    someone please help me
    i like this fulmics rom
    but can it this run in lg g3 d858hk, marshmallow 6.0 kdz, rooted by kingroot?

  8. sajjad says:

    how can i convert my lg g3 d851 to marsmallow

  9. Heriberto Gonzales says:

    Anyone have problem whit the ÀPN, need help please

  10. saidtik says:

    hi no possiblity to ad new apn

  11. Roussety Jean Gregory says:

    Hi, I am still having issues with my camera after the fix. What can i do?

    LG G3 D855 international***

  12. MCB says:

    Guys mine fails I tried many times, TWRP says no md5 file found. Plz help me to install it.

  13. MCB says:

    I finally installed it and it is fabulous.

  14. fk says:

    imei is g0ne after flashing fulmics r0m

  15. Anjum Ashraf says:

    Dear Lee i appreciate your work, i have lg g3 tmobile in my opinion fulmics is the best 3rd party rom for g3

  16. Nikolai says:

    Hey , can i shoot in 4k in this rom ?

  17. Manjothi says:

    I flash fulmice rom on d851 and reboot
    No disply

  18. leandro says:

    Great ROM, but after upgrade it, i dont have rintones, alarms and notification sounds anymore. Why? there is a Fix?

    note> the files are in /system/media/audio/Ringtones but the phone ignores

  19. CARLOS says:

    Installed and worked perfectly up until about a day agon when my phone would restart after I opened certain apps. It’s becoming more constant now i don’t know if it’s my phone or the rom but my phone seem to be fine when I flash something else.

  20. Zeke says:

    On 4.4.2 and tried to install but no aroma do i need to be on lollipop? Or am i doing something wrong using twrp

  21. Eric says:

    Is this compatible with lg g3 d858hk marshmallow v30a?

  22. matthwe says:

    Hi would anyone know a ROM that is suitable for a ZTE Grand 2 S291?

  23. sidra says:

    Hi.. I wanna update my LG G3 F400L version to lollipop or marshmallow.. plz guide me and tell the right procedure.. I’ll be waiting for reply. Thanks

  24. Jon says:

    I love Fulmics ROM on my G3 (D850). The ONLY issue that I currently have right now for the MM ROM is that you have to install Fulmics 5.1 and get your phone configured and then download and flash Fulmics 5.2-5.3. Other than that, it’s a great ROM.

  25. Chaitanya Dadi says:

    Hi, My LG G3 ATT version has bootloop and I tried many methods to clear this but no result. May I have any other alternatives to do.

  26. Hiram Saldivar says:

    For fix the 3g/4g
    Don’t shows any option to add a new apn only restore…

  27. Cocis Razvan says:

    Hi I have LG-D858HK can I run it on my device?
    I will wait for feedback 🙂
    thank you in advance!

  28. Sajjad hussain says:

    File not found
    Fulmic rom for lg g3

  29. shahid says:

    Anyone tried flashing fulmics 6.0 on their LG G3 D858HK yet?

  30. Cranne says:

    Download link does not work.
    Ayone have another link?

  31. Gabe says:

    Bluetooth isn’t functioning. Do you know how to fix this?

  32. Raja says:

    I cant root my lg g3 tmobile marshmallow ..
    Tried king root but it says no strategy found .
    Anybody help plz

  33. DIego says:

    Link not working-

  34. revin says:

    i cannot find a camera fix under fixes in fulmics hub ..wat do i do ??i cant open my camera app

  35. Shawn says:

    Download link does not work. Needs to be updated. Great site by the way. Glad to have the e-mail updates!

  36. Fahad says:

    i have same fulmics 5.1 rom (6.0 marshmallow) with lg g3 d850.
    every thing is working perfect expect battery timing even i have installed xposed framework with greenify and amplify.
    i don’t know what is the issue with it.
    can anybody help..
    is it safe to move downgrade ???
    i have seen on different websites that the fulmics roms take alot of battery.

  37. Tal says:

    Flumics ROM download link is broken…
    Help please

  38. Tal says:

    I have downloaded Fulmics 6.6 from the internet

  39. M KUMARSWAMY says:


  40. Russell says:

    Is there no longer acess to the download of this ROM?

  41. Aaron says:

    Can’t get 4g/LTE on this rom with my Canadian d852..disappointing as its a good rom besides that. Might have to switch back to cm13.

  42. Simon says:

    For anybody installing fulmics 7.6 on g3 I can say it’s great.

  43. Cjabrahams says:

    Need help all ready have fulmics rom but cant get twrp or any recovery on my lg g3 d-722 please help Max

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