[LG Spirit Guides, News, & Discussion] arunps:
How to update H442 to Marshmallow.

I'M NOT RESPONSIBLE IF YOU BRICK YOUR DEVICE, this worked for me and I'm sharing what I found, these are the steps to get MM working please read everything carefully.

Software Necessary

:

LG Drivers: LG Drivers

Visual C++ Runtime Library (just in case): Visual C++ Runtime Library

LG UP Store Version: ( First install LGUP_8994_DLL_Ver_0_0_3_23, then LGUP_Install_Ver_1_14_3.) LG UP Store Version

LG UP Lab Version: ( First install LGUP_8994_DLL_Ver_0_0_3_23, then LGUP_Lab_Frame_Ver_1_10.msi.) LG UP Lab Version

LGUP_common.dll: LGUP_common.dll

Script that makes LG UP recognize our device: Script

KDZ and TOT Extractor: KDZ and TOT Extractor

Rom:

H440N Marshmallow: H440n20b_00_0530.kdz

Procedure:

01. Install ver 0.0.3.23

02. Install ver 1.14.3

03. Open xxxx_.reg file with notepad and replace all H440n with H442

04. Rename C:\Program Files (x86)\LG Electronics\LGUP\model\8994 to C:\Program Files (x86)\LG Electronics\LGUP\model\8916

05. Copy LGUP_8916.dll, xxxx_.reg to C:\Program Files (x86)\LG Electronics\LGUP\model\8916\

06. Open xxxx_.reg file and merge

07. Extract .dz from .kdz using extractor

08. Get into download mode, with phone turned off keep pressed volume up and plug your usb, keep in mind you need all the drivers already installed. OR LG Up automatically turn device to download mode when start button clicked

09. Open LGUp. Remember LGUp uses only .tot files. So you have to browse and type xxxxxx.dz file name on folder previously extracted.

10. Select Refurbish. Click Start. Once that is done your phone will reboot. Done..!

Known Errors:

01. No Volte

02. No Radio App

03. NT Code Warning

Flashing Screenshots

01. [IMG="Registry"]http://i.imgur.com/bljStFm.png[/IMG]

02. [IMG="Folder"]http://i.imgur.com/TJXqlTb.png[/IMG]

03. [IMG="Extractor"]http://i.imgur.com/EUliFsx.png[/IMG]

04. [IMG="Extracted"]http://i.imgur.com/VKx1HOC.png[/IMG]

05. [IMG="LG Up"]http://i.imgur.com/ysCCNVN.png[/IMG]

06. [IMG="File Selection"]http://i.imgur.com/RhPXFKQ.png[/IMG]

07. [IMG="Click Start"]http://i.imgur.com/tiQNicP.png[/IMG]

08. [IMG="Progress"]http://i.imgur.com/ecVz5NQ.png[/IMG]

09. [IMG="Progress"]http://i.imgur.com/pOuL7lK.png[/IMG]

10. [IMG="Progress"]http://i.imgur.com/iTdcYFy.png[/IMG]

11. [IMG="Rebooting"]http://i.imgur.com/RXI6kam.png[/IMG]

12. [IMG="Progress"]http://i.imgur.com/CAHhiAZl.png[/IMG]

13. [IMG="Completed"]http://i.imgur.com/qHJh18b.png[/IMG]

14. [IMG="Upgrading"]http://i.imgur.com/vRQBydJh.jpg[/IMG]

15. [IMG="Contry Code Error"]http://i.imgur.com/ihkPlcb.png[/IMG]

16. [IMG="Home Screen"]http://i.imgur.com/15xbefI.png[/IMG]

17. [IMG="Status Bar"]http://i.imgur.com/CQ7kuNW.png[/IMG]

18. [IMG="About"]http://i.imgur.com/E8HqyFd.png[/IMG]

19. [IMG="Software Information"]http://i.imgur.com/GttxDX3.png[/IMG]

Feel free to help me to fix country code error without rooting...

How to fix NT-Code Warning:

01. Instead of ver 1.14.3 install LGUP_Lab_Frame_Ver_1_10.msi

02. Instead of LGUP_8916.dll use LGUP_common.dll

03. Rename LGUP_common.dll to LGUP_8916.dll and paste it to C:\Program Files (x86)\LG Electronics\LGUP\model\8916\

04. Use H44020b00.dz extracted from H440n20a_00_0511.kdz

05. By Using LGUp lab version You can enter custom NT Code

06. Enter new input code "1","FFF,FFF,FFFFFFFF,FFFFFFFF,58" click write. Once that is done your phone will reboot. Done..!

Known Errors:

01. No Volte

NT Code Dialog

01. [IMG="NT Code Entry"]http://i.imgur.com/NYoeShWl.jpg[/IMG]

02. [IMG="Updated"]http://i.imgur.com/Qkphkvml.png[/IMG]

How to enable VoLTE in Marshmallow...???

Thank You...

All credits to

XDA Developers