[LG V40 Questions & Answers] ghostbuster_21:
Hi

I just wanted to add some more info, in case it's of any use to anyone, of my travels in LG V40 ROM-land.

I'm in the UK and I bought an LG v40 128Gb Korean version - LM-V409N on Android 9/Pie.

Like 'AzzKickah', I also wanted to get rid of the places where Korean characters still appeared on the phone which were:

when you search for new themes via Settings->Display->Wallpaper & theme

when you set the ring tone or notification sound, all the ring tone and notification names are in Korean

Korean characters appear on the phone dialler although the English ones appear as well so this is not really a big problem

on the lock screen there is always a dual clock one of which shows the time in Korea (but this can be removed see notes below)

Whilst none of the above is the end of the world and the phone with its' Korean ROM works fine in the UK, I still wanted to give it a go and

try to get it to be a UK version ROM. Stupid maybe? Why risk bricking it for no reason....spoiler alert, despite lots of ROM flashing I didn't brick it.

So, as already described in this thread, ensure that:

LGUP is version 1.15

common dll file for LG v40 is installed.

Then using the following commands via a Windows 'Powershell', here are the ROMs I flashed and the results:

Notes:

1. I think that using the Windows Powershell and 'lgup_cmd.exe' instead of the 'lgup.exe' GUI, is what others refer to as "side loading".

2. I did not have to 'root' my phone to be able to flash ROMs using this method.

3. flashing each ROM only takes about 3 minutes

4. when you connect your phone to your laptop via USB, you can get the COM port number (shown as the generic comXX in the commands below) via device manager.

Testing flashing different ROMs onto LG V40 LM-V409N (128Gb Korean Version)

First 'cd' to the directory containing the 'lgup_cmd.exe' file, in my case:

cd 'C:\Program Files (x86)\LG Electronics\LGUP'

try 1 Europe '20c' - Android 9

------------------------------

.\lgup_cmd.exe comXX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "C:\LG v40 roms\V405EBW\V405EBW20c_00_OPEN_EU_DS_OP_0905.kdz"

FAIL - with a SIM card inserted, if wi-fi is ever turned off it won't turn back on again - Alas this makes this ROM unusable in the LM-V409N.

(this is exactly the same problem that 'Azzkickah' mentions)

try 2 Europe '20b' - Android 9

------------------------------

.\lgup_cmd.exe comXX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "C:\LG v40 roms\V405EBW\V405EBW20b_00_OPEN_EU_DS_OP_0702.kdz"

FAIL - with a SIM card inserted, if wi-fi is ever turned off it won't turn back on again - Alas this makes this ROM unusable in the LM-V409N.

try 3 Europe '20a' - Android 9

------------------------------

.\lgup_cmd.exe comXX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "C:\LG v40 roms\V405EBW\V405EBW20a_00_OPEN_EU_DS_0524.kdz"

FAIL - with a SIM card inserted, if wi-fi is ever turned off it won't turn back on again - Alas this makes this ROM unusable in the LM-V409N.

try 4 Europe '10f' Android 8

----------------------------

.\lgup_cmd.exe comXX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "C:\LG v40 roms\V405EBW\V405EBW10f_00_OPEN_EU_DS_OP_0307.kdz"

FAIL - with a SIM card inserted, if wi-fi is ever turned off it won't turn back on again - Alas this makes this ROM unusable in the LM-V409N.

try 5 Australia '20b' Android 9

-------------------------------

.\lgup_cmd.exe comXX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "C:\LG v40 roms\V405EBW\V405EBW20b_00_OPEN_AU_DS_OP_0711.kdz"

FAIL - with a SIM card inserted, if wi-fi is ever turned off it won't turn back on again - Alas this makes this ROM unusable in the LM-V409N.

I then had a idea. I noted that the Korean version is listed as single SIM whereas the European versions of the LG V40 are all dual sim phones.

Perhaps the SIM ports are scanned before the wi-fi is turned back on? Since the Korean LM-V409N doesn't have a second SIM, maybe the wi-fi hangs at this check (because it can't find a second SIM) and the wi-fi is never turned back on?

So to test this thory I thought I would try flashing a single SIM ROM onto my single SIM v40 to see if this fixed the wi-fi problem as given above when flashing the dual SIM ROMs.

try 6 USA Unlocked '20a' Android 9

------------------------------

.\lgup_cmd.exe comXX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "C:\LG v40 roms\V405QA7\V405QA720a_03_NAO_US_OP_0529.kdz"

FAIL - with a SIM card inserted, if wi-fi is ever turned off it won't turn back on again - Alas this makes this ROM unusable in the LM-V409N.

So alas, even after flashing the above USA ROM (single SIM) it suffered the same wi-fi problem. Theory shot down in flames 8-(

So in the end, like 'AzzKickah', as shown below I went back to the open Korean ROM and accepted the few places where Korean language still appeared.

try 7 revert to Korea '20h' Android 9

-------------------------------------

.\lgup_cmd.exe comXX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "C:\LG v40 roms\V409N\V409NO20h_00_OPEN_KR_OP_1004.kdz"

PASS - When you insert a SIM card the wi-fi works correctly.

Final Notes:

The ROMs that failed above will have no wi-fi problem until you insert a SIM card as I found out the hard way having ported all my old phone's apps and settings, getting it just as I wanted it, and then I put the SIM card in only to find out that the wi-fi problem reappeared.

So for anyone else who wants to verify my results or try different ROMs on their own V40, the quickest way to spot the wi-fi issue is to have a SIM card already in the phone when you flash it. After flashing the new ROM, when the phone resets and goes therough the initialisation screens, as soon as you hit the wi-fi screen (this is about the 2nd or 3rd screen) try to turn the wi-fi off and then on again. If the ROM has the wi-fi issue then this will be immediately apparent because the wi-fi will not turn back on again or may turn on but will not list any available wi-fi networks and ask you to pick one via manually entering an SSID, but this will result in the same problem.

When the LG V40 wi-fi is working, loading web pages was lightning fast compared to my old LG G6 and here are some stats to back up why that is probably the case:

LG G6:

Link speed = 351 Mbps

Frequency = 5Ghz

LG V40 (Korean ROM):

Link speed = 866 Mbps

Frequency = 5Ghz

Solution for removing dual clock on lock screen - Korean LG V40:

The dual clock (which shows UK and Korean times) on the lock screen was bugging me a bit so I searched around for a fix to this and actually found one as follows.

See also https://forums.hardwarezone.com.sg/lg-user-group-224/%5Bofficial%5D-lg-v50-5985789-16.html

1. Download the app 'Quick Shortcut Maker' from the Play store.

2. At the top, change the incremental search to normal search.

3. Search for 'clock'. One of the items under the clock should be 'Roaming clock settings'

4. Select this 'Roaming clock settings' and then in the 'Edit shortcut' screen press 'Try'.

5. Unselect the 'use roaming dual-clock' option

6. Job done

Launchers on my V40 on Android 9/Pie:

If you are still with me so far after this epic brain-dump I shall add a few notes on some various launcher I tried and some issues I hit as well on the LG V40.

1. Evie launcher - this was me preferred launcher on my G6 but on the V40 you cannot lock the screen with a double tap (i.e. KnockOn feature) with this launcher and then re-open with the fingerprint. It will insist on pattern or pin. On the LG G6 the fingerprint scanner was also a lock button this was never an issue for me as I didn't need to use double tap, but on the V40 you have to use the lock button on the RHS of the phone which requires an awkward shift in hands. That could be just me being uber fussy.

2. Microsoft launcher - I liked this launcher a lot and it even allowed the double tap (KnockOn feature) to lock the phone as if you had pressed the lock button, so after doing that you can reopen the phone via the fingerprint scan. However I had some issues with the notification badges. I could get the WhatsApp notification badges to appear correctly but I couldn't get the text/SMS notifications to appear at all.

3. Nova launcher - this launcher also allowed the double tap (KnockOn feature) to lock the phone as if you had pressed the lock button, so after doing that you can reopen the phone via the fingerprint scan. However to get this feature you had to buy what they call the 'Prime' version for about £4. I also managed to get the notification badges working with Nova launcher. It's got more than enough settings I can play around with to get my home screen, app drawer etc. as you like it so I have stayed with this launcher.

Thanks