LTE Band Selection Problem (Band3, Band7) - Verizon LG G4

Hi, I am new to the forum and want to share my experience about LTE BandSelection.
As discussed in the previous thread, you can access to Verizon Hidden Menu called LTEBANDSELECTION. By default, Band2 Band4 Band13 are checked and Band5 is unchecked. However, from LG website LTE 3/7 is supported for Roaming, but those bands are not on the list.
I can confirm that at least Band3 is working because I am on a carrier that uses Band8 and Band3. The problem is that, when I try to change the LTE band selections above (ex: adding Band5 to the list), it seems that LTE3/7 is not working anymore. After changing it once, I only get 3G signal without any LTE. The only way that I can get the Band3 signal again is going back to the original stock rom (13b) again.
It is weired that there is no hidden menu to select Band3/7. Do you have any idea on this problem? Thanks!

Related

[Q] Change 3G band to European GSM 900/1800

A family member gifted me a Galaxy S4, however it is the SGH-M919. I currently live in Europe and 3G bands in my region are GSM 900/1800. At the moment I can't access 3G and any other type of data for that matter (LTE is not supported here). Is there a way to change T-mobile 950 and 1900 bands to my region ones?
Thanks for taking your time to answer
Sadly not.
Since the radio does not support those frequencies for hsdpa
TheArtiszan said:
Sadly not.
Since the radio does not support those frequencies for hsdpa
Click to expand...
Click to collapse
So there's no way to fix it?
Hello Flex,
I have the same phone "Samsung S4 SGH-M919 - Tmobile" and I live in Hungary, it works fine with me all you have to do is just to switch form WCDMA/GSM to any other option "like GSM only" then back to WCDMA/GSM as a kind of refresh and the 3G will work fine after that, you can find this inside Settings > More Networks > Mobile Networks > Network mode, but unfortunately you have to do this every time you restart your device.
There is also another alternative solution is to reset the Access point names to default, you can find this inside Settings > More Networks > Mobile Networks > Access Point Names.
to be honest I don't know the reason of this error, but try what I described and tell me if it works with you.
Good Luck
Well. I have the exact same phone and have tried several ROMs, either custom or stock and basebands also. Nothing seems to work. The very few users who reported it was working didn't provide much evidence of it. Even Wikipedia says no 3G 900MHz availability for this phone. A simple edit to NV 1877 values won't solve it. I've tried that too.

Force band 12

One of the good things about the gs6 is the ability to for b12 and even better ability to choose preferred band in automatic mode.
Does the m9 have some sort of ability like that?
You are talking about the WIFI channel 12 (which is illegal to put your WIFI on in the US)?
Actually I think he is talking about forcing a specific LTE band... (in this case LTE Band 12 which I think is for T-Mobile). Specifically accessing the LTE Band service menu.
For any Samsung device you would enter *#2263# and the "LTE Band" service menu would open up and you can force a specific band. IF this is what he is talking about, it’s actually a great feature because you can "lock in" LTE to a specific band, I use to do this all the time in the Philippines so I wouldn't get kicked off the LTE band. You can also see what LTE bands the phone supports.
When I had the M9, I looked everywhere and tried to find the code to access the LTE menu but I was unsuccessful. Maybe someone here has the code to access the LTE service Band menu. There were some generic codes that work for Google in general BUT none of them worked on the M9.
Try *#*#4636#*#*
crx4xharder said:
Try *#*#4636#*#*
Click to expand...
Click to collapse
That only can forcelte in general
mcmikelw said:
Actually I think he is talking about forcing a specific LTE band... (in this case LTE Band 12 which I think is for T-Mobile). Specifically accessing the LTE Band service menu.
For any Samsung device you would enter *#2263# and the "LTE Band" service menu would open up and you can force a specific band. IF this is what he is talking about, it’s actually a great feature because you can "lock in" LTE to a specific band, I use to do this all the time in the Philippines so I wouldn't get kicked off the LTE band. You can also see what LTE bands the phone supports.
When I had the M9, I looked everywhere and tried to find the code to access the LTE menu but I was unsuccessful. Maybe someone here has the code to access the LTE service Band menu. There were some generic codes that work for Google in general BUT none of them worked on the M9.
Click to expand...
Click to collapse
*#2263# doesn't work for me
But yes LTE band 12
##DATA# on Sprint lets you do something like this, but I believe that code is Sprint-specific.

Flash European software?

Hey guys, apologies if this has been asked before or if this is a silly question.
I recently bought an Asian Lg G3 d855. The software version is D85510e-GLOBAL-COM.
The phone is working fine apart from not having any 4g connectivity. I have went into settings and tried to change to GSM/WCDMA/LTE auto but it doesn't connect to 4g and switches back to GSM/WCDMA auto as soon as I exit the screen.
I have also went into the hidden menu, to LTE ONLY, RAT selection and tried to change it there but still no 4g. If I choose "LTE only" I lose my signal completely.
I have also went into band selection and chosen band 20, as this is the LTE band for my network in the UK (O2). It says success when I click on it but still no 4g.
My question is, is it possible to flash a European software version and would this enable the 4g?
Or is there any other way to enable 4g on this phone?
Thanks in advance!

How to set network mode to 4G only?

Please help.. Is there a way to set network mode to 4G only or LTE only?... In settings, I only have the Autoconnect, 2G only and 3G only options.. Thanks..
Is your SIM card already 4G supported? What's your carrier?
The 4G auto connect is available? Apps might be able to access 4636 without root. In there, if there's an option, select phone information, then lock the RAT to 4G only. Alternatively, if *#2263# or *#2683662# is available, in *#0011# select the other SIM if there is any, then in those other codes, band selection, GSM ALL (for the unused SIM), change SIM again with *#0011#, band selection, LTE ALL(for the used SIM). What's expected: If the SIM is not a USIM, the RAT will stay on 3G(UMTS/WCDMA). If the USIM is not authorized, no signal. With soft PLMN locking (manual operator search) the signal level is shown but it's unusable. If the signal is still not available, maybe the phone does not support that band/frequency or no LTE coverage? If rooted it's possible to add LTE only in those settings in feature.xml, if that file is not available others.xml is used. Or launch 4636, or RIL service mode with am broadcast.
Use this app (no root needed). Set to LTE ONLY. Works fine.
play.google.com/store/apps/details?id=com.ather.networkmode&hl=nl
This is worth a try. It's 4636.
ADD THIS IN system\csc\other.xml
<CscFeature_Setting_CustNetworkSelMenu4>LTEONLY</CscFeature_Setting_CustNetworkSelMenu4>
Click to expand...
Click to collapse
its very easy. you just need to install this app https://play.google.com/store/apps/details?id=com.teknokia.mtkengineerapp&hl=en and choose LTE Switcher menu. for detail info please go to https://www.teknokia.com/2017/08/how-to-lock-4g-only-or-lte-only-on.html
*#2263#

Useful tip for switching LTE bands in the G710EAW (and possibly other versions)

If you try to change bands in the service menu (e.g. from Band 4 to band 2) and you have LTE but phone calls don't work at all (just says call ended instantly), just go to "network mode" and select automatic, which will get voice working again on your new band.
Turning the sim card off and back on won't fix that--that will just make the band reset to default (with voice working) which isn't want you wanted if you were switching bands.
This can be useful on low tier providers if one band is lagging horribly and another band is more reliable.
I just recently discovered the service menu, does this actually enable bands that normally aren't active? I see Band 71 here which I thought was only available on the TMobile US variant, yet here I am with the ULM model and it shows it in the menu. I'd like to enable it in case I'm ever in an area that supports it, but I'm not sure what this menu actually does?

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