Enabling VoLTE Option on LG V40 - and Other LG Phones

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Hinko

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#321514 23-Aug-2025 21:09

Seems I may have enabled the VoLTE option on my LG V40 by:

Create a folder within internal storage called "enable_ue" (without the quotes).
Go to Phone app, dial *#546368#*405# (Note all the bold typeface characters are required - Seems to vary by model - I found using 405 got me straight into the hidden menu - While the phone is a V40, its specific model is LM-V405EBW....guess where 405 comes from!).
Tap "Field Test", "UE ((For Universal Enabler)", "Create New Config".
Tick the four Vo/Vi LTE/WIFI options.
Tap CONFIRM.
Then go to Settings / "Network & Settings" / "Mobile networks" where I found the new VoLTE option present and already selected!

Looks promising but how to test beyond waiting?

Hope this helps some more LG users!

Maybe there's a way in the hidden menu to enable the earthquake warning messages but it was not obvious. There's a heap of stuff that can be fiddled with there! Beware!

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#3406875 23-Aug-2025 21:14

Call someone and see if the handset hands down to 3G or the call or stays on 4G / LTE

Hinko

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#3406884 23-Aug-2025 21:22

Wow, fast response, thanks Linux! I called an iphone on different network but can't see something that convinced me the system used.

While connected I went into settings and noted both the VoLTE menu option and Network mode (preferred network mode: GSM / WDCMA / LTE auto) options were greyed out during the call. Can one do better?

Linux

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#3406885 23-Aug-2025 21:24

Can't you see the 3G or 4G icon on the main screen when on a call?

Hinko

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#3406886 23-Aug-2025 21:30

No nothing like that comes up. The only phone network related icon is the signal strength bars / triangle. :-(

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#3406888 23-Aug-2025 21:32

Can you lock handset to 4G only?

Hinko

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#3406889 23-Aug-2025 21:38

I don't think so, as above the "Network Mode" options only has 4 options, "preferred network mode: GSM / WDCMA / LTE auto" is the top one, the other three are lesser combinations not involving LTE, yeah I though there might be a VoLTE option there too, but no, just the new menu item above the network mode to enable VoLTE or not.

FWIW the VoLTE text says: "Use high-quality voice calls and communication services on LTE" and the Mobile Network Type is showing as "LTE".

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Hinko

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#3406890 23-Aug-2025 21:44

Actually made a call again and checked the "Network" information under "About Phone", out of a call it shows as "LTE" but during the call it was "UMTS" fwiw my phones on ONE and called an iPhone on Spark.

grantius

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#3406891 23-Aug-2025 21:44

Turn your wifi off and call someone, signal bar show stay on 4g if it's working (or have a little VoLTE icons next to it)

Linux

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#3406941 23-Aug-2025 21:50

The number / network you are calling does not matter and UMTS is 3G / WCDMA

Hinko

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#3406943 23-Aug-2025 21:50

Not looking so good, with WiFi disabled it has "4G" over the bars icon, phoning again it drops to 3G and H intermittently swapping between these.

Unless there is something which enables this in the network or some network issue (like 3G off) its not looking promising!

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#3406947 23-Aug-2025 22:02

VoLTE will just work if the handset supports it and has the correct profile loaded

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Hinko

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#3406948 23-Aug-2025 22:24

When I search for available networks LTE comes up for One, Spark and 2degrees, but no VoLTE, should I be seeing VoLTE yet? (Also GSM and WCDMA come up as available options) Does anyone see VoLTE as an option?

Asteros

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#3406949 23-Aug-2025 22:57

VoLTE requires a profile (configuration setup) to be installed on your phone software. I seriously doubt this phone will ever get a software update with One NZ's profile or any other NZ cell network as it was released in 2018. You won't be able to make voice calls when 3G is turned off in December 2025 on One NZ. Time to get a newer phone with NZ VoLTE profiles unfortunately - but be wary of parallel imported Android models. Modern Iphones have NZ profiles along with those from virtually every network globally.

Hinko

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#3406951 23-Aug-2025 23:09

Yes I had expected that to be the case until I came across how to enable VoLTE - but of course it does not mention Country specific profiles. Sorry to waste peoples time on this.

The likely need to replace LG V40 phones seems high with the turning off of 3G if one wants to make voice calls. I gather 4G data will continue to work!

Asteros

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#3406955 23-Aug-2025 23:27

The V40 will become a 4G tablet essentially except for app based calls such as via WhatsApp etc. Any mid range and up modern phone will be a much better experience than this V40, plus I think it has Android 10 and I don’t know how long modern apps can be installed on these older Android versions.

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