Develop Bugs

[Q] [Stock rooted 4.1.2] I can't set my phone on 4G (LTE)

Hi XDA members !
I need your help about an issue I encountered on my Optimus G E975.
I'm French, my carrier is Free and I recently activated the 4G (LTE) option proposed in my plan, no problem.
I then wanted to enable the 4G network mode in my stock ROM, here comes the problem !
The LG's ROM only let me choose between 2G, 2G/3G or 3G networks. My phone is compatible, my APN are ok, Free's settings are ok too... So I decided to modify the build.prop file to force the 4G choice. I edited those lines :
- ro.telephony.default_network (changed value from 9 to 10, referring to a Google Code thread)
- telephony.lteOnCdmaDevice=1 into telephony.lteOnGsmDevice=1
I can now choose 2G/3G/4G setting and it seems to be working, but after each reboot, it doesn't stay checked and goes back to "2G/3G".
Can you help me please ?

xandersx said:
Hi XDA members !
I need your help about an issue I encountered on my Optimus G E975.
I'm French, my carrier is Free and I recently activated the 4G (LTE) option proposed in my plan, no problem.
I then wanted to enable the 4G network mode in my stock ROM, here comes the problem !
The LG's ROM only let me choose between 2G, 2G/3G or 3G networks. My phone is compatible, my APN are ok, Free's settings are ok too... So I decided to modify the build.prop file to force the 4G choice. I edited those lines :
- ro.telephony.default_network (changed value from 9 to 10, referring to a Google Code thread)
- telephony.lteOnCdmaDevice=1 into telephony.lteOnGsmDevice=1
I can now choose 2G/3G/4G setting and it seems to be working, but after each reboot, it doesn't stay checked and goes back to "2G/3G".
Can you help me please ?
Click to expand...
Click to collapse
Well, in any case, this is not a big problem.. You can also enter the secret code which i dont remember now, and force LTE, without any build.prop line. The problem is i dont remember the secret code menu.
EDIT: *#*#4636#*#*. Tap the first option, and scroll down. You will see a list. Tap and select LTE or 4G. Reboot and try if it works.

nch26 said:
Well, in any case, this is not a big problem.. You can also enter the secret code which i dont remember now, and force LTE, without any build.prop line. The problem is i dont remember the secret code menu.
EDIT: *#*#4636#*#*. Tap the first option, and scroll down. You will see a list. Tap and select LTE or 4G. Reboot and try if it works.
Click to expand...
Click to collapse
I just tried your idea. After *#*#4636#*#*, selected the first option ("Phone informations"), that displays the page with my phone infos but it's not accessible because of a pop-in saying "The application does not work on this device."
I can't do anything...

xandersx said:
I just tried your idea. After *#*#4636#*#*, selected the first option ("Phone informations"), that displays the page with my phone infos but it's not accessible because of a pop-in saying "The application does not work on this device."
I can't do anything...
Click to expand...
Click to collapse
Its weird since your phone is same like me...

nch26 said:
Its weird since your phone is same like me...
Click to expand...
Click to collapse
I tried flashing the .KDZ file compatible with my phone, no more success...
I'll keep me searching for a solution, it's frustrating to have a 4G-ready phone without 4G.

xandersx said:
I tried flashing the .KDZ file compatible with my phone, no more success...
I'll keep me searching for a solution, it's frustrating to have a 4G-ready phone without 4G.
Click to expand...
Click to collapse
Sorry for no solution !

nch26 said:
Sorry for no solution !
Click to expand...
Click to collapse
No problem, thanks for your try

I have the same problem. The 4G option just wont stick!
I'm on stock 4.1.2 and have not changed anything - had the 4G option from the get go. I also can't access the "secret menu" when typing in *#*#4636#*#* - I'm getting the same error.
Been looking for a solution for days, but nothing. Talked to LG - they suggested to reset the APN and then do a factory restore of the phone if that did not work.
Anybody found a solution?

nch26 said:
Well, in any case, this is not a big problem.. You can also enter the secret code which i dont remember now, and force LTE, without any build.prop line. The problem is i dont remember the secret code menu.
EDIT: *#*#4636#*#*. Tap the first option, and scroll down. You will see a list. Tap and select LTE or 4G. Reboot and try if it works.
Click to expand...
Click to collapse
bullcrap why is not working ?
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

GalaxySIIII said:
bullcrap why is not working ?
Click to expand...
Click to collapse
Dont support on your optimus g variant.

nch26 said:
Dont support on your optimus g variant.
Click to expand...
Click to collapse
there must be different code then

Hi guys!
It's been a while since my last message here.
Just back to say my problem was solved by a little OTA update which probably brings valid LTE/4G configuration for my carrier (Free).
Today, I'm facing the same problem but on the GEE 3 ROM freshly flashed. Things are progressing but some problems stay the same x).
I'll contact devs about those problems.

LG G3 D850 not Work in 3G or LTE

Greetings friends, I consulted the following information.
I have a LG G3 D850 but does not work on 3G or LTE with my carrier frequencies (GSM 850 - 3G UMTS / HSDPA 1900 Mhz - Band 4 LTE).
I change the Stock ROM 4.4.2 for CloudyG3 2.5, however I think these bands are blocked in the phone because the information indicates that this model is compatible.
Is there any way to remove this blockade of these bands?

GersonS001 said:
Greetings friends, I consulted the following information.
I have a LG G3 D850 but does not work on 3G or LTE with my carrier frequencies (GSM 850 - 3G UMTS / HSDPA 1900 Mhz - Band 4 LTE).
I change the Stock ROM 4.4.2 for CloudyG3 2.5, however I think these bands are blocked in the phone because the information indicates that this model is compatible.
Is there any way to remove this blockade of these bands?
Click to expand...
Click to collapse
Most likely your modem is gone, go to settings...about the phone....software information and if on baseband version says unknown ,then your modem is gone and you have to flash the proper modem for your model.
See here: http://forum.xda-developers.com/att-lg-g3/general/modems-collection-d850-21r-20f-10d-t3213856
Look in software version for your version, mine is v10m

ludoke said:
Most likely your modem is gone, go to settings...about the phone....software information and if on baseband version says unknown ,then your modem is gone and you have to flash the proper modem for your model.
See here: http://forum.xda-developers.com/att-lg-g3/general/modems-collection-d850-21r-20f-10d-t3213856
Look in software version for your version, mine is v10m
Click to expand...
Click to collapse
The Baseband of my phone is MPSS.DI.2.0.1.cl.13-00058-M8974AAAAANPZM-1...
Screenshot about my cell information
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

GersonS001 said:
Greetings friends, I consulted the following information.
I have a LG G3 D850 but does not work on 3G or LTE with my carrier frequencies (GSM 850 - 3G UMTS / HSDPA 1900 Mhz - Band 4 LTE).
I change the Stock ROM 4.4.2 for CloudyG3 2.5, however I think these bands are blocked in the phone because the information indicates that this model is compatible.
Is there any way to remove this blockade of these bands?
Click to expand...
Click to collapse
Does 2g or h+ work

Work only in edge (850)...

Did you tried to see your carrier

The carrier and the APN configuration its ok.
The problem in the device, is that it seems that the frequencies were blocked. I bought this device because according to the same information, it is compatible with my carrier frequencies.

Is it rooted?

jonnyszt said:
Is it rooted?
Click to expand...
Click to collapse
Yes friend, the device is root, with CloudyG3 2.5 installed. With the stock rom 4.4.2 it shows the same problem.

My phone is the same... I can only select wcdma i have no lte of and kind... Tried selecting bands nothing...

Google~Android said:
My phone is the same... I can only select wcdma i have no lte of and kind... Tried selecting bands nothing...
Click to expand...
Click to collapse
I have read something about unlock bands with Qualcomm Product Support Tools (QPST)...

Ill give it a go later... Ive done it before.. It just seemed odd to me

I had the exact same problem... i fixed it with a new sim card

xarosgg said:
I had the exact same problem... i fixed it with a new sim card
Click to expand...
Click to collapse
An AT&T sim card??? #LOL

xarosgg said:
I had the exact same problem... i fixed it with a new sim card
Click to expand...
Click to collapse
GersonS001 said:
An AT&T sim card??? #LOL
Click to expand...
Click to collapse
oh wow!! and here i was having headaches trying to fingure why dfs tool showed all band enable and yet i couldn't select them..

GersonS001 said:
Yes friend, the device is root, with CloudyG3 2.5 installed. With the stock rom 4.4.2 it shows the same problem.
Click to expand...
Click to collapse
Did you try to do a factory reset but before that remove your sim card and APN setting and but it back in and reenter the APN setting. Also try to check if your network precedents is set to the first one. If you did all that and it stills doesn't work, try a factory reset

jonnyszt said:
Did you try to do a factory reset but before that remove your sim card and APN setting and but it back in and reenter the APN setting. Also try to check if your network precedents is set to the first one. If you did all that and it stills doesn't work, try a factory reset
Click to expand...
Click to collapse
No friend... everything indicated has been made, without satisfactory result

Try changing your simcard

How to use dual SIM on H930DS with H930v20d and no 2G network.

Hi all, I flashed the update from https://forum.xda-developers.com/lg-v30/development/h930-lg-v30-european-market-h930-t3779076 and upon flashing I noticed that only the SIM that had data activated could connect to a network, I dug around a bit and found out that it was trying to connect to a 2G GSM network which no longer exists on my carrier.
I found no other tutorials so if you are stuck this is how I fixed it on my phone.
You need to do this every time your phone restarts until someone finds a way to make it stay like this
1) Open your phone app
It does not need to be the stock app, you just need to open it
2) Enter the following hash code
*#*#4636#*#* THIS IS DIFFERENT FROM THE NORMAL LG HIDDEN MENU
It will look like this
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Then go to phone information
It will look like this
3) Change it from GSM only to LTE / WCDMA
You should now have your service back

i'm unable to go into Phone Information. It shows "This application does not work on this device."
i'm using Singapore variant H930DS. Revert back to Nougat due as i need dual sim to works.

If I only use one sim at a time, would I still have issues with the data connection?

toiret said:
Hi all, I flashed the update from https://forum.xda-developers.com/lg-v30/development/h930-lg-v30-european-market-h930-t3779076 and upon flashing I noticed that only the SIM that had data activated could connect to a network, I dug around a bit and found out that it was trying to connect to a 2G GSM network which no longer exists on my carrier.
I found no other tutorials so if you are stuck this is how I fixed it on my phone.
You need to do this every time your phone restarts until someone finds a way to make it stay like this
1) Open your phone app
It does not need to be the stock app, you just need to open it
2) Enter the following hash code
*#*#4636#*#* THIS IS DIFFERENT FROM THE NORMAL LG HIDDEN MENU
It will look like this
Then go to phone information
It will look like this
3) Change it from GSM only to LTE / WCDMA
You should now have your service back
Click to expand...
Click to collapse
I did this in My G6 H870DS ..
"Installed H870 Oreo on My H870DS"
But signal not works .. Any ideas ?

HuEx said:
I did this in My G6 H870DS ..
"Installed H870 Oreo on My H870DS"
But signal not works .. Any ideas ?
Click to expand...
Click to collapse
Various things to check try...
Your APN is correct and enabled?
Try adding another APN.for your carrier (look up settings online), reboot, see if it acts different.
Try flashing your old modem in dev patched LG LGUP (modem only). May not work as it's Nougat and you're on Oreo now and for a "different" model number, but in Motorola your could flash previous versions. Not sure about LG.
Flash back to Nougat in LGUP.

ChazzMatt said:
Various things to check try...
Your APN is correct and enabled?
Try adding another APN.for your carrier (look up settings online), reboot, see if it acts different.
Try flashing your old modem in dev patched LG LGUP (modem only). May not work as it's Nougat and you're on Oreo now and for a "different" model number, but in Motorola your could flash previous versions. Not sure about LG.
Flash back to Nougat in LGUP.
Click to expand...
Click to collapse
i Cant access APn ..
if u Plz Check this .. https://app.box.com/s/36i65wafqln3bq1pftpth3fx45ieb5rs
i have vodafone and circle above keep moving like searching about signal .. im in area with signal .. "checked this with another one "

ChazzMatt said:
Various things to check try...
Your APN is correct and enabled?
Try adding another APN.for your carrier (look up settings online), reboot, see if it acts different.
Try flashing your old modem in dev patched LG LGUP (modem only). May not work as it's Nougat and you're on Oreo now and for a "different" model number, but in Motorola your could flash previous versions. Not sure about LG.
Flash back to Nougat in LGUP.
Click to expand...
Click to collapse
no .. Apn not enabled .
excuse me .. how to flash old modem ? i dont knw if u plz could explain this point

HuEx said:
no .. Apn not enabled .
excuse me .. how to flash old modem ? i dont knw if u plz could explain this point
Click to expand...
Click to collapse
Show screenshot of APN settings, please. Like this. Because if the APN is correct but not enabled, then you need to turn it on, you need to enable it.
Sent via open market LG US998 V30/V30+

ChazzMatt said:
Show screenshot of APN settings, please. Like this. Because if the APN is correct but not enabled, then you need to turn it on, you need to enable it.
Sent via open market LG US998 V30/V30+
Click to expand...
Click to collapse
i cant access Mobile Networks it cant open cause i think mobile doesnt recognize sim ..
also something i cant flash old modem only .. H870DS "Bootloader Locked "
I Think i will Back to Nougat ..
Thank u ChazzMatt ..
Im so sorry .. Have a Nice Day Bro .. ^^

Bought in USA, can do something to use in EU?

Hey,
I bought an LG G7 ThinQ (LMG710TM) in the USA, and i does not connect to the LTE/4G mobile data network here in Hungary. Since it's a T-mobile version i thought if i could unlock it, it may work (i can use my Telekom SIM since the beggining to call/send msg), but i can't get the unlock bin trough LG site, because it says it's an LMG710TMP version which is unlockable, but the phone itself says it just te TM version withouth the P on the end.
Anyways should I even bother to try to unlock it, because i didn't really find any infos which frequencies are supported by my own device, so it maybe just blocked by the software or not.
Thanks!!

Mr.Tree said:
Hey,
I bought an LG G7 ThinQ (LMG710TM) in the USA, and i does not connect to the LTE/4G mobile data network here in Hungary. Since it's a T-mobile version i thought if i could unlock it, it may work (i can use my Telekom SIM since the beggining to call/send msg), but i can't get the unlock bin trough LG site, because it says it's an LMG710TMP version which is unlockable, but the phone itself says it just te TM version withouth the P on the end.
Anyways should I even bother to try to unlock it, because i didn't really find any infos which frequencies are supported by my own device, so it maybe just blocked by the software or not.
Thanks!!
Click to expand...
Click to collapse
It's not rooted right?
Enter the service menu and check the bands. If it says "SUCCESS" then that band is supported. If it says "FAIL" it's not.
Bands 2, 4 and 12 are the ones usually used with GSM LTE in America.

Falkentyne said:
It's not rooted right?
Enter the service menu and check the bands. If it says "SUCCESS" then that band is supported. If it says "FAIL" it's not.
Bands 2, 4 and 12 are the ones usually used with GSM LTE in America.
Click to expand...
Click to collapse
Thank you for your help!
And yes, it's not rooted.
I checked the service menu, the listed(pic1,pic2) bands are all working, at least it said "SUCCESS" when i clicked on them, and in Hungary they use band 3,7 and 20.
I set it on 3, tried to reinsert simcard and restart phone, and airplane mode etc,etc little tricks to get it work, but still no mobile data.
The weird thing i found is the LTE Carrier Aggregation(pic3,pic4). It says what is says on the picture and i can't change it, because it tells me i need to restart my phone. I did it but no changes, so it just stuck at those options. I suspect the problem is there for some reasons that i don't know.
On pic5/pic6 those are some infos about the LTE stuff, sometimes it said Not Supported Mode at the Mode Pref, sometimes it said Automatic. Sadly i don't really know what that means, maybe it will provide some infos to you.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

Mr.Tree said:
Thank you for your help!
And yes, it's not rooted.
I checked the service menu, the listed(pic1,pic2) bands are all working, at least it said "SUCCESS" when i clicked on them, and in Hungary they use band 3,7 and 20.
I set it on 3, tried to reinsert simcard and restart phone, and airplane mode etc,etc little tricks to get it work, but still no mobile data.
The weird thing i found is the LTE Carrier Aggregation(pic3,pic4). It says what is says on the picture and i can't change it, because it tells me i need to restart my phone. I did it but no changes, so it just stuck at those options. I suspect the problem is there for some reasons that i don't know.
On pic5/pic6 those are some infos about the LTE stuff, sometimes it said Not Supported Mode at the Mode Pref, sometimes it said Automatic. Sadly i don't really know what that means, maybe it will provide some infos to you.
Click to expand...
Click to collapse
Did you contact the mobile provider and ask them to add your phone's IMEI to their service?
In USA, some people who bought the LG unlocked international phones did not have mobile data until they called the carrier and had them register the IMEI number.

You'll most likely need to setup your APN manually. Go to settings-network and add APN info for your provider there!

bdasmith said:
You'll most likely need to setup your APN manually. Go to settings-network and add APN info for your provider there!
Click to expand...
Click to collapse
I set up the APN and it work now. Thank you very much for your help, it's kinda unbelieavable that it was this easy!

Mr.Tree said:
I set up the APN and it work now. Thank you very much for your help, it's kinda unbelieavable that it was this easy!
Click to expand...
Click to collapse
Your welcome. Glad to help ?

[Guide] Hidden Network Settings (Exynos) (Root / Non-Root method)

How to get Hidden Network Setting in Pie
Non-Root Method
Using shortcut Master navigate to
(Call settings/com.samsung.android.app.telephonyui.hiddennetworksetting.MainActivity) As shown below ​
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Credits @megatooth
(Root Method)​
1. Preparing files
a. ES File Explorer of equivalent ( Must be able to change file permission )
b. download latest HiddenNetworkSetting apk Link
c. Shortcut Master(Lite)
2. Lets begin
a. Change the apk name to "hiddennetworksetting.apk" (reference, 1.b) :laugh:
b. Navigate to (/system/app) and create a new file named "hiddennetworksetting" with the following permission
c. Copy the apk file to (/system/app/hiddennetworksetting) and change its permission to the following
​
d. Restart your phone
3. Access Hidden Network Setting Through Shortcut Master
Network Options
​
Credits @saif.dmaster

How do you copy do anything on system/app? Its RO and cant be remounted

zeroktal said:
How do you copy do anything on system/app? Its RO and cant be remounted
Click to expand...
Click to collapse
(Root Required)

I am rooted, but it doesnt allow me to remount.

Only these 3 options are available?

pRo_lama said:
Only these 3 options are available?
Click to expand...
Click to collapse
You can choose the network mode, such LTE only. Other option is bands selection i.e. band lock.

pRo_lama said:
Only these 3 options are available?
Click to expand...
Click to collapse
you can change it from es explorer settings.
Tap on the three lines in the upper left corner. scroll down till you see "Root Explorer" make sure its toggled on, also tap on the same option you'll see the permissions option. you'll be able to change it from there.

I have N976B no root. I use Activity Launcher for acces Hidden Network Settings (Exynos):

megatooth said:
I have N976B no root. I use Activity Launcher for acces Hidden Network Settings (Exynos):
View attachment 4865925
View attachment 4865927
View attachment 4865929
View attachment 4865931
Click to expand...
Click to collapse
Would've been nice if someone has mentioned it before.

tested with activity launcher or shotcut master, with non rooted phone, when i click in "band selection", i have a "Fail" in bottom on the screen.

Need to select "Network Mode".

Finally with Android 10 update on galaxy note 10 plus in Europe the hidden network settings are searchable again with shortcut master. The problem is again it's only working on the first sim card slot and not on the 2 sim! This is really frustrating does any one have a solution how to be able to at least have lte only on sim slot 2 on Android 10 Samsung devices without root?

Majeeds91 said:
How to get...​
Click to expand...
Click to collapse
Ok I have access but will you please let me know best settings?​

megatooth said:
I have N976B no root. I use Activity Launcher for acces Hidden Network Settings (Exynos):
View attachment 4865925
View attachment 4865927
View attachment 4865929
View attachment 4865931
Click to expand...
Click to collapse
The same applies to Android 10 N9750/G975F :good::good::good:

In the description of hiddennetworksetting.apk, the android version is at least 6.0.
I have installed it on samsung s6, android 6.0.1. Does not work. (((

so how do we use these settings...any one have any ideas?
thanks

I am getting fail for selecting a network and band selection. Using a G955U on Visible. Any Ideas on why all options fail?

Personally I wouldn't play around with these settings. I did it a while back on my OnePlus 7 Pro and couldn't remember the default settings. I was without signal for quite a while it was a headache for no real gain or reward.

I have nothing against you, but if you don't know what you're changing, then why are you doing it?

It is difficult to mess things up in these settings, as it is merely an extension of the network modes in regular settings menu. Moreover, they can be reset to default easily.
Practical use can be, how I use it, is to select the lte bands in such a way that in specific location connection to a particular mast can be maintained. E.g. by deselecting B1 my phone remains steadily connected to mast A with CA enabled and high throughput. If I leave B1 on my phone is constantly switching connection between mast A and mast B, resulting in slower connection.