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LTE band select warning (Fix in Post 3)

So we all know there are many settings to play around with under the 3845#*850* menu. Under LTE there is a setting to select what LTE band you want to be on. I learned the hard way, DON'T touch those. Your phone will be on whatever band you select and will not switch bands automatically. I can't seem to get it back to the way is was before even with a factory reset so I;m just warning you guys.

Did you get this resolved?
I have done this on my VZW G3. Did you get this resolved? I selected b4 and b13 and now I that I see you'd thread I'm wondering if doing this will lock me out of the new Qualcomm band unlocking using QPST.

wizayne said:
I have done this on my VZW G3. Did you get this resolved? I selected b4 and b13 and now I that I see you'd thread I'm wondering if doing this will lock me out of the new Qualcomm band unlocking using QPST.
Click to expand...
Click to collapse
Yes I have found a way. This is with the d850 model so it may be a little different
1. Download the application Shortcut master found here: https://play.google.com/store/apps/details?id=org.vndnguyen.shortcutmaster.lite
2. In the application, press the menu button and select "secret code explorer"
3. Look for the option that has "com.lge.hiddenmenu.updt.UnitedDebugToolReceiver" and press it then press explore
4. Next look for RAT_Selection with the description under it as "com.lge.hiddenmenu.lte_only.RAT_Selection. This one is about 60% of the way down the menu. Don't get it confused with the one that says wcdma in the description.
5. Once that's launched, Select Wcdma or CDMA only. Wait for it to connect, then select LTE only, wait for it to connect then select the multimode option of whatever network you're on (AT&T: GSM/WCDMA/LTE auto VZW should be CDMA/LTE auto)
6. To confirm no specific LTE band is selected, back out of that menu, then scroll down to "BandSelection" Do not go to "LteBandSelection" it will give you the wrong options. Once in the menu, it should say none selected and you should still be connected to LTE.

THEGAMEPLAY94 said:
Yes I have found a way. This is with the d850 model so it may be a little different
1. Download the application Shortcut master found here: https://play.google.com/store/apps/details?id=org.vndnguyen.shortcutmaster.lite
2. In the application, press the menu button and select "secret code explorer"
3. Look for the option that has "com.lge.hiddenmenu.updt.UnitedDebugToolReceiver" and press it then press explore
4. Next look for RAT_Selection with the description under it as "com.lge.hiddenmenu.lte_only.RAT_Selection. This one is about 60% of the way down the menu. Don't get it confused with the one that says wcdma in the description.
5. Once that's launched, Select Wcdma or CDMA only. Wait for it to connect, then select LTE only, wait for it to connect then select the multimode option of whatever network you're on (AT&T: GSM/WCDMA/LTE auto VZW should be CDMA/LTE auto)
6. To confirm no specific LTE band is selected, back out of that menu, then scroll down to "BandSelection" Do not go to "LteBandSelection" it will give you the wrong options. Once in the menu, it should say none selected and you should still be connected to LTE.
Click to expand...
Click to collapse
So i was looking through and accidently clicked a band. but nothing happened and i tried this fix but it keeps telling me could not find file when i try to launch "com.lge.hiddenmenu.lte_only.RAT_Selection". What happens if you click a band?

Shadow Assassin said:
So i was looking through and accidently clicked a band. but nothing happened and i tried this fix but it keeps telling me could not find file when i try to launch "com.lge.hiddenmenu.lte_only.RAT_Selection". What happens if you click a band?
Click to expand...
Click to collapse
On my ATT device it would stay on the band you selected only and wouldn't automatically switch between them.
edit: try going to "com.lge.hiddenmenu.kddi_only.NetworkMode" change your network mode to Gsm/WCDMA then to LTE only then back to LTE/GSM/WDCMA and it should reset whatever you may have selected in the other menu.

THEGAMEPLAY94 said:
On my ATT device it would stay on the band you selected only and wouldn't automatically switch between them.
edit: try going to "com.lge.hiddenmenu.kddi_only.NetworkMode" change your network mode to Gsm/WCDMA then to LTE only then back to LTE/GSM/WDCMA and it should reset whatever you may have selected in the other menu.
Click to expand...
Click to collapse
I then receive an error message. Heres a screenshot.
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So i have had this problem for a while. My fiance has a g3 as well and it connects to 4g lte. Hers isnt rooted but mine is. I have followed all of the instructions that you posted to fix the problem, but when i tap on lte only, a message box comes up that says failed, sane with automatic. When i tap gsm or wcdma, it says success. Any ideas what might be going on. Any help will be appreciated!!!
Here is the screenshot, sorry it took so long. Any one that I hit that contains LTE in it comes up with this fail message. The only ones that will show success are wcdma and gsm. Thanks for your time!!!

reolwolf said:
So i have had this problem for a while. My fiance has a g3 as well and it connects to 4g lte. Hers isnt rooted but mine is. I have followed all of the instructions that you posted to fix the problem, but when i tap on lte only, a message box comes up that says failed, sane with automatic. When i tap gsm or wcdma, it says success. Any ideas what might be going on. Any help will be appreciated!!!
Here is the screenshot, sorry it took so long. Any one that I hit that contains LTE in it comes up with this fail message. The only ones that will show success are wcdma and gsm. Thanks for your time!!!
Click to expand...
Click to collapse
I have never seen that before.

Ya i dont really know, im thinking im going to call at&t tomorrow and see what they're tech department says. Thanks for the help!!!

Scared the **** out of me... (Fixed)
I accidentally selected one of the bands, and it wouldn't automatically switch anymore. I have to say I have an unrooted D855. I came online to search and scared the **** out of me, and nothing I tried from this thread worked. I happened to stumble upon a thread teaching how to enable LTE on some G3 devices using this menu, and they said settings only last UNTIL REBOOT. So came my hope:
FIX: Just reboot.
Verification: I selected some band that has no 4G network at my location, 4G disappeared. rebooted. 4G appeared. Problem solved. Not sure why it didn't work for TS (maybe TS is rooted), but worked for me (unrooted).

When i click LTE only i get an error message saying "Restricted access changed" voice service is blocked? and it doesnt connect to the LTE network which in my case is band 3 1800mhz. please help . when i try selcecting the band manually is says failed.

adnshah said:
When i click LTE only i get an error message saying "Restricted access changed" voice service is blocked? and it doesnt connect to the LTE network which in my case is band 3 1800mhz. please help . when i try selcecting the band manually is says failed.
Click to expand...
Click to collapse
I have the same problem. Any help ?

How to Enable/Use LTE Band 4(1700/2100) To Use on GSM carriers 4G LTE With Calls!

Hi, first sorry for my bad english and this is my first tutorial
soo! lets start!
recently purshase a samsung s5 from verizon and i see the specs the lte bands are compatible with my network here in mexico(telcel)
soo i put the sim in the phone and he only takes 3G and H+, i go to options to change network mode and.... the problem is there no option for GSM/WCDMA/LTE, only Global, LTE/CDMA and GSM/WCDMA and for that reason dont use the band 4(1700/2100) to use 4g
i loocking for tutorials and no luck, i try the Phone Info menu(*#*#4636*#*#) and menu not pop up like other phone i have, thats why i make this tutorial to have 4g data for gsm networks and the most important you can make phone calls without change to GSM/UMTS or something like that
FIRST OF ALL I'M NOT RESPONSIBLE IF YOU BROKE YOUR PHONE FOR NO FOLLOW THE GUIDE
i have rooted with rick's rom v20 nk2 firmware i dont know if this work on other rom, soo let us know if this work in other rom or fimware BUT YOU NEED ROOT
if you have enable already the hidden menu then you can skip to step 2 if not follow step 1 to enable
1.you need to enable hidden menu: this can be done be modifyng in text editor with a program like root explorer, the file from this directory -----> /efs/carrier/HiddenMenu file
like i said with a text editor open that file and change OFF to ON and save, reboot the phone
2.when the phone fully reboot, open the phone app and dial this --->*#27663368378#
with that you enter in the servicemode
3.in service mode Select: [2]UE SETTINGS & INFO, then [1]SETTING, then select [2]SYSTEM, then [9]NEXT PAGE and then select [7]LTE BAND ON/OFF, then [2]LTE B4 ON/OFF, and finally [1]B4 Enable, need be selected like the image below:
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then restart your phone
4.now its fully reboot open the phone app and dial again ---->*#27663368378#
enter in servicemode again and select [2]UE SETTINGS & INFO, then [1]SETTING, then [1]PROTOCOL, then [2]NAS, then [1]NETWORK CONTROL, then [5]PREF MODE SET, and finally [7]GSM_WCDMA_LTE_ONLY and wait for the magic
when yor restart your phone says no service and pop up the menu dont service and tells you to change to global mode please cancel and wait for reception! if you change to global or other mode you need to do again the step 4 to put again in GSM/WCDMA/LTE ONLY
THATS ALL!:good:
NOTE: I WAS PLAYING IN THE LAST STEP BEFORE [5]PREF MODE SET IN THE [1]NETWORK CONTROL MENU, I CHOOSE [4]BAND SELECTION INSTEAD OF [5]PREF MODE SET, SOO IF THE STEPS DONT WORK LET ME KNOW TO ADD SOME EXTRA STEPS IF NEEDED

This enabled 1700/2100 (AWS) for LTE only correct? Just curious if it would work for enabled WCDMA for 1700/2100 on HSPDA+ for 4G also?

GrandMstrBud said:
This enabled 1700/2100 (AWS) for LTE only correct? Just curious if it would work for enabled WCDMA for 1700/2100 on HSPDA+ for 4G also?
Click to expand...
Click to collapse
its not only 1700/2100 LTE, when you make a call the phone automatically change to 3g umts
thats why call GSM/WCDMA/LTE
with this you can use verizon samsung s5 like others gsm phone 4g

*#27663368378# doesn't take me to the Menu? Is there another way?

How do you set it back the way it was? Or how do I turn off the GSM stuff. All I care about is better Verizon signal.
Once I did this, my signal has been bouncing back and forth from full bars down to 3. Any idea why?

Any help in order to add the lte band 4 to my S5 duos sm-g900fd , I need because I use T-Mobile while I am in US.
Thanks

When I make these changes it still drops me to 3G on calls. Not sure what the deal is really. Was hoping for 4g/calls at the same time.

enkryptik said:
When I make these changes it still drops me to 3G on calls. Not sure what the deal is really. Was hoping for 4g/calls at the same time.
Click to expand...
Click to collapse
Try switching from sim use to nv use. It's in the service menu under rtre config.
The phone supports LTE Bands 2,3,4,5,7,13,17 and 20. I'll post back

Tried and so far, nothing stops my phone from dropping to 3g when making a call. Also, some of these changes cause speedtest.net app to think I'm about 5 states away from where I actually am. Switching back, it puts closest server back to Indiana.....

I am using T-Mobile on this phone so not having to have my phone drop data to make phone calls would be great. I wasn't able to get this to work, but would be interested in knowing if others on T-Mobile can get this to work.
Thanks

andyandmarlys said:
I am using T-Mobile on this phone so not having to have my phone drop data to make phone calls would be great. I wasn't able to get this to work, but would be interested in knowing if others on T-Mobile can get this to work.
Thanks
Click to expand...
Click to collapse
So far, I haven't found anyone able to successfully change this on a Verizon phone because it has a locked bootloader. Hopefully, one day soon.

ALUCARD4DEAD said:
3.in service mode Select: [2]UE SETTINGS & INFO, then [1]SETTING, then select [2]SYSTEM, then [9]NEXT PAGE and then select [7]LTE BAND ON/OFF, then [2]LTE B4 ON/OFF, and finally [1]B4 Enable, need be selected like the image below:
View attachment 3092264
Click to expand...
Click to collapse
Hi. In the final step on step #3, it says "finally [1] B4 Enable"...but the screen shot attached shows [2] B4 Disable. Which one should we follow? Should we enable it or disable it?
Thanks.

AlpineMan said:
Hi. In the final step on step #3, it says "finally [1] B4 Enable"...but the screen shot attached shows [2] B4 Disable. Which one should we follow? Should we enable it or disable it?
Thanks.
Click to expand...
Click to collapse
enable my friend
the screen shot its only for reference

thepinkpanter said:
Any help in order to add the lte band 4 to my S5 duos sm-g900fd , I need because I use T-Mobile while I am in US.
Thanks
Click to expand...
Click to collapse
you need to check the bands, if there are compatible with the band of tmobile the process will be similar but depend of the bands and the baseband
andyandmarlys said:
I am using T-Mobile on this phone so not having to have my phone drop data to make phone calls would be great. I wasn't able to get this to work, but would be interested in knowing if others on T-Mobile can get this to work.
Thanks
Click to expand...
Click to collapse
i dont know because i dont use tmobile, but if the bands are compatible.....then sould be work

i tried this with Verizon branded s5 on T-Mobile and it did not work. It wouldn't even show up as LTE. Straight dropped to H+.
Is doing this the same thing as what 5.0 does in the mobile network settings? I upgraded to 5.0 previously and it switched one of the settings to GSM/UMTS/LTE which it was previously GSM/UMTS.

Does anyone know if running a custom ROM will resolve this issue?

Does anyone know if it's possible to enable Verizon voice cdma band on a gsm/LTE (t-mobile) model s5 ? Or is the hardware in the sprint/Verizon models truly custom?

I tried this on my g900v S5 running Ricks Rom. Step one change off to on resulted in soft bricking with reboot having a toast pop up saying systemui has stopped. Touch ok and it goes to the home screen then same pop up loops back to lock screen over and over.
How to fix?
In recovery-advanced-file manager, when selecting the efs file, nothing is in it to edit and it only shows "up one file" or something like that.
What should be checked under "mount"? There are checkboxes for Micro SDCard, Internal Storage, Data, Cache and system.
Thanks

DroidinAndStuff said:
I tried this on my g900v S5 running Ricks Rom. Step one change off to on resulted in soft bricking with reboot having a toast pop up saying systemui has stopped. Touch ok and it goes to the home screen then same pop up loops back to lock screen over and over.
How to fix?
In recovery-advanced-file manager, when selecting the efs file, nothing is in it to edit and it only shows "up one file" or something like that.
What should be checked under "mount"? There are checkboxes for Micro SDCard, Internal Storage, Data, Cache and system.
Thanks
Click to expand...
Click to collapse
In your file browser, check the settings to include hidden files and folders.

Rapunzl said:
In your file browser, check the settings to include hidden files and folders.
Click to expand...
Click to collapse
no such settings exist in safestrap and there is no getting in any other way
I'll gladly stand corrected if I am wrong about safestrap settings

Quick Guide: How to enable and use ServiceMode

Ok, since now we have root, many users wanted to know if they can lock onto certain LTE frequency bands using Samsung's ServiceMode. So here is a quick guide.
ServiceMode is Samsung's proprietary Engineering Mode, built within the TouchWiz framework, readily available on International variants, and some domestic like T-Mobile. It allows us to observe the RF connection, change certain RF related settings, and lock our phones onto specific technologies and frequencies. Sadly, Verizon has been blocking user access to Engineering Mode for years now.
So in order to enable access to ServiceMode on Verizon GS6/Edge you'll need to:
- Download Root Explorer
- Navigate to /efs/carrier/HiddenMenu
- Use TextEdit to open it (not text viewer)
- Change the value to ON (upper case), Save and Exit
- Restart the phone
Once restarted you can dial:
*#0011# to observe the connection
If you want to lock your device onto a specific LTE band (13, 4, 2):
*#27663368378#
- UE Settings & Info
- Settings
- Protocol
- NAS
- Network Control
- Band Selection
- LTE Band Selection
Here you can force your phone onto a specific Verizon LTE Band (13, 4, 2), or use LTE ALL if you have VoLTE (Advanced Calling) enabled as this will eliminate the need for CDMA radios.
To go back to default, go through the same process but at Band Selection make sure to chose AUTOMATIC.
There are a lot more settings here, you can enable AMR WB on UMTS if you use T-Mobile so you can get HD Voice on their UMTS layer, etc... Carrier Aggregation has already been enabled, so no need to tweak that.
If you aren't sure what certain settings and values correspond to, it's better to avoid tinkering. You're responsible for your own actions.
If you find this guide useful, hit the thanks button. :good:
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Thanks for this.
So if you choose a LTE band, you'll be locked into 4G, and not able to connect to 3G or 1X?

Squintz said:
Thanks for this.
So if you choose a LTE band, you'll be locked into 4G, and not able to connect to 3G or 1X?
Click to expand...
Click to collapse
Yes, that's correct. If Advanced Calling (VoLTE) has been enabled on your account, your voice calls will go through. Otherwise, make sure you select Automatic when you're done testing in order to get CDMA voice access.

What's the benefit of this? Wouldn't the phone lock onto the highest strength band? Hope that doesn't come across argumentative, I really don't know how this stuff works.

I locked mine to Band 4 and my crappy download speeds (2-4 Mbps) jumped to 21-44 Mbps. Went back to Automatic and it dropped back to 4 Mbps.
Sent from my SM-G925V using XDA Free mobile app

s197 said:
What's the benefit of this? Wouldn't the phone lock onto the highest strength band? Hope that doesn't come across argumentative, I really don't know how this stuff works.
Click to expand...
Click to collapse
Typically the most popular roads with the most cars are the slowest, right? Now that Verizon has multiple lanes (LTE Bands), you can attempt to alleviate the congestion issue that you might be experiencing.
Also one of the side benefits of selecting LTE ALL (with VoLTE enabled on the account) at least in markets with solid LTE coverage, is the improved standby time, as the device isn't trying to activate CDMA radios.

milan03 said:
Typically the most popular roads with the most cars are the slowest, right? Now that Verizon has multiple lanes (LTE Bands), you can attempt to alleviate the congestion issue that you might be experiencing.
Also one of the side benefits of selecting LTE ALL (with VoLTE enabled on the account) at least in markets with solid LTE coverage, is the improved standby time, as the device isn't trying to activate CDMA radios.
Click to expand...
Click to collapse
So what you're saying is if you are connected to a high traffic band, your phone won't switch you over to a less used one automatically? Is there some sort of app or setting that shows the traffic on each particular band?
I'm not so much concerned about cell standby since it doesn't seem to be impacting me for whatever reason but if I can get better download speeds, that's definitely something I would look into.

s197 said:
I'm not so much concerned about cell standby since it doesn't seem to be impacting me for whatever reason but if I can get better download speeds, that's definitely something I would look into.
Click to expand...
Click to collapse
Well it's up to you to figure that out. I've put the guide out.

Thanks

Milan, can you try PCI cell locking (sector locking)?
Note 2 and Note 3 have the option in Service Mode but it doesn't work.
Also, I wonder if there is a provision to configure CA bands so that a desired configuration of uplink and downlink bands can be chosen.

xdadevnube said:
Milan, can you try PCI cell locking (sector locking)?
Note 2 and Note 3 have the option in Service Mode but it doesn't work.
Also, I wonder if there is a provision to configure CA bands so that a desired configuration of uplink and downlink bands can be chosen.
Click to expand...
Click to collapse
PCI Cell lock has been disabled on every single Samsung phone that I can think of. The Menu is still there, but it's not actionable within ServiceMode.
As for forcing primary and secondary component carrier, that's typically set on the network side per cluster or per market basis. For example, in NYC market AT&T has CA set to Band 2+17 format, not the other way around. Can't be forced on the UE.
It would be beneficial for Verizon to have a wider bandwidth channel (band 4) set to be the primary as the upload isn't being aggregated and it's dictated by the PCC.

milan03 said:
PCI Cell lock has been disabled on every single Samsung phone that I can think of. The Menu is still there, but it's not actionable within ServiceMode.
As for forcing primary and secondary component carrier, that's typically set on the network side per cluster or per market basis. For example, in NYC market AT&T has CA set to Band 2+17 format, not the other way around. Can't be forced on the UE.
It would be beneficial for Verizon to have a wider bandwidth channel (band 4) set to be the primary as the upload isn't being aggregated and it's dictated by the PCC.
Click to expand...
Click to collapse
Thanks,
I wonder if PCI lock is a feature only possible on a special radio firmware. Perhaps field techs are running an enhanced radio on their test phones not available to the consumer.
I recall the FCC docs show that the S6 has various band combinations for CA on the uplink. So Verizon isn't planning on using CA on the uplink?
I am very interested to know their CA strategy because I am usually in an area where download speeds are acceptable on Band 4, but the uplink is nearly nonexistant on Band 4.
I usually have to use a device without Band 4 support or else my phone often jumps to Band 4 and the upload is about worthless. I can force Band 13 on Samsung devices but then I lose CDMA.
I actually would prefer most of the time:
Downlink: Band 2+4+13 OR 4+13
Uplink: Band 13
Didn't want to hijack the thread, I can edit post and take it to PM if you prefer.

xdadevnube said:
Thanks,
I wonder if PCI lock is a feature only possible on a special radio firmware. Perhaps field techs are running an enhanced radio on their test phones not available to the consumer.
I recall the FCC docs show that the S6 has various band combinations for CA on the uplink. So Verizon isn't planning on using CA on the uplink?
I am very interested to know their CA strategy because I am usually in an area where download speeds are acceptable on Band 4, but the uplink is nearly nonexistant on Band 4.
I usually have to use a device without Band 4 support or else my phone often jumps to Band 4 and the upload is about worthless. I can force Band 13 on Samsung devices but then I lose CDMA.
I actually would prefer most of the time:
Downlink: Band 2+4+13 OR 4+13
Uplink: Band 13
Didn't want to hijack the thread, I can edit post and take it to PM if you prefer.
Click to expand...
Click to collapse
I know for a fact that PCI lock is something that RF Field Engineers have access to, but they don't really use ServiceMode, or use it for a quick glance at the values. They use a third party software that directly reads and controls Qualcomm baseband, and that Android piece of software costs $5,000+ per license, and it's tightly integrated with the IMEI of that test phone. There are thousands of KPIs that can be read with it, or logged for post processing and analysis at the later time.
FCC only performs tests on the uplink to make sure the radiated power at the device under test is within the safe range, and since the existing Release 10 network infrastructure doesn't support Carrier Aggregation on the Uplink (only Downlink), FCC only lists the potential downlink CA combinations for the device under test. They actually don't test the downlink at all, and it doesn't mean that the operator will have all of those combinations enabled on the network side.
Furthermore, at this time there aren't any operators globally with a commercial network capable of uplink CA, that includes Korean operators. That should change with proliferation of Category 7, 10, and 12 commercial User Equipment at some point in the future, but commercially seeded user devices with Samsung, Qualcomm RF solutions (like S6, M9, etc) are only category 6, 9, not supporting uplink CA.
Your uplink issue may very well be caused by some kind of interference at your Serving Cell Site or clustered area. Which cellular market is it?
In my market I've seen peak uplink rates just under 40Mbps on Band 4 in a 20MHz channel, typically in the 20's.

As an amateur radio operator and general mobile telecom junkie a million thanks for this! I love having control over the LTE band I'm camping on. I've been in Denver all week and for whatever reason in downtown Band 4 was slammed (1-4 meg down) but 13 was wide open (20+ down), yet the phone insisted on camping on Band 4. Whambamthankyoumaam, hello Band 13 .

I have an International Galaxy S6 (Europe) SM-G920F and I can't open SERVICE MODE (for Band Selection, etc)
Code *#27663368378# doesnt' work, and directory /efs/carrier/ doesn't even exist (tried to make one, but doesn't help)
With my previous Galaxy S5, I used to do:
dial *#0011#
menu -> back
menu -> insert key ... then type: Q0 and press ENTER
Now, with S6, only works *#0011# (Read Only), but I cant go any further...
Please help me and every European people with Galaxy S6 :crying:

Legend35 said:
I have an International Galaxy S6 (Europe) SM-G920F and I can't open SERVICE MODE (for Band Selection, etc)
Code *#27663368378# doesnt' work, and directory /efs/carrier/ doesn't even exist (tried to make one, but doesn't help)
With my previous Galaxy S5, I used to do:
dial *#0011#
menu -> back
menu -> insert key ... then type: Q0 and press ENTER
Now, with S6, only works *#0011# (Read Only), but I cant go any further...
Please help me and every European people with Galaxy S6 :crying:
Click to expand...
Click to collapse
Just type in *#197328640# for main menu or *#2263# to lock to a freq band directly.
Let me know.

milan03 said:
Just type in *#197328640# for main menu or *#2263# to lock to a freq band directly.
Let me know.
Click to expand...
Click to collapse
Just tried both... they don't work! :crying::crying::crying:

Legend35 said:
Just tried both... they don't work! :crying::crying::crying:
Click to expand...
Click to collapse
Is that 920F that you're using?

milan03 said:
Is that 920F that you're using?
Click to expand...
Click to collapse
Yes of course, european SM-G920F, I live in Italy. I've tried with brand, no-brand firmwares, but none of them works
If you found those codes on internet, they must be wrong and nobody checked them before publishing...
I want to lock my phone in 3G+4G but I can't... that's so bad!

Legend35 said:
Yes of course, european SM-G920F, I live in Italy. I've tried with brand, no-brand firmwares, but none of them works
If you found those codes on internet, they must be wrong and nobody checked them before publishing...
I want to lock my phone in 3G+4G but I can't... that's so bad!
Click to expand...
Click to collapse
Here is the thing, the ServiceMode dial codes I'm giving you is something I've been personally using over the years. Codes also work just fine on 920T, 920W8, 920V.
You could try digging a bit into the file structure, or check out international S6 subforum. Good Luck!

Question 2G on A13

Can anyone who has already upgraded a Pixel 6a to A13 tell me if the "Allow 2G" option is still available in Settings-->Networks-->SIMs ?
Some people on twitter are saying that they cannot set 2G as a "preferred" network anymore, not sure what it implies.

The option is still here yes. However, you can't set 2G as the preferred network type.

Try this..
Open Dialer
type :- *#*#4636#*#*
Click on Phone info
Select Preferred Network type & Scroll Down & select "GSM Only"

Thank you guys.
Current situation is bizarre for me. I need 2G working for voice only. My carrier is switching 3G off, and I cannot have VoLTE working (despite the corresponding option being enabled and carrier saying that it should work). Currently, when I make a phone call, the 4G data connection gets disabled and voice travels over 3G or 2G. When the phone call is over, 4G data connection gets back on. Since 3G is being switched off, if 2G suddenly became totally unavailable, I simply couldn't make phone calls anymore.

septimvs80 said:
Thank you guys.
Current situation is bizarre for me. I need 2G working for voice only. My carrier is switching 3G off, and I cannot have VoLTE working (despite the corresponding option being enabled and carrier saying that it should work). Currently, when I make a phone call, the 4G data connection gets disabled and voice travels over 3G or 2G. When the phone call is over, 4G data connection gets back on. Since 3G is being switched off, if 2G suddenly became totally unavailable, I simply couldn't make phone calls anymore.
Click to expand...
Click to collapse
I believe you can get a number with Google Voice, and call thru the app. I haven't used it in a while tho.

for toggle option is enable for 3G and 44, in Android 12 was 2G, 3G amd 4G
fix
type :- *#*#4636#*#*
Click on Phone info
Select Preferred Network type & Scroll Down & select "GSM Only"
is working
is any chance for fix this issue ?

htw1 said:
for toggle option is enable for 3G and 44, in Android 12 was 2G, 3G amd 4G
fix
type :- *#*#4636#*#*
Click on Phone info
Select Preferred Network type & Scroll Down & select "GSM Only"
is working
is any chance for fix this issue ?
Click to expand...
Click to collapse
Are you not seeing this? Or are we talking about something different?

Yes, indeed.

htw1 said:
Yes, indeed.
Click to expand...
Click to collapse
Indeed youre not seeing this option?

ctfrommn said:
Indeed youre not seeing this option?
Click to expand...
Click to collapse
After update to Android 13
1

htw1 said:
After update to Android 13
1
Click to expand...
Click to collapse
Thats very odd....how did you get to A13?

via OTA, my system said you have new update. Google Pixel 4a

htw1 said:
via OTA, my system said you have new update. Google Pixel 4a
Click to expand...
Click to collapse
Well, this is a Pixel 6a thread so not sure if the 4a had other changes. You might check on that forum instead/as well.

This is mine, Pixel 6a with A13

Meloferz said:
This is mine, Pixel 6a with A13
View attachment 5697095
Click to expand...
Click to collapse
Very interesting....I just did a full wipe, clean flash to A13. Nothing special and I changed nothing.

ctfrommn said:
Very interesting....I just did a full wipe, clean flash to A13. Nothing special and I changed nothing.
Click to expand...
Click to collapse
I think that probably depends on the carrier, because with my other carrier I have this options:
5G appears now, but I just guessing

Meloferz said:
I think that probably depends on the carrier, because with my other carrier I have this options:
View attachment 5697117
5G appears now, but I just guessing
Click to expand...
Click to collapse
Probably, yeah.

CYB3R0ID694 said:
Try this..
Open Dialer
type :- *#*#4636#*#*
Click on Phone info
Select Preferred Network type & Scroll Down & select "GSM Only"
Click to expand...
Click to collapse
Any chance of automating this with tasker?
I used "Toggle Network Type" app on earlier android, but not it can't set 2G as preferred type anymore.
Edit: actually it was Automate app that I used, but neither it nor Toggle network type work.

Not sure if you have tried enabling this option in the SIM settings (something to do with the Tensor Security settings as Google deem 2G to be less secure.

MrUrgit said:
Not sure if you have tried enabling this option in the SIM settings (something to do with the Tensor Security settings as Google deem 2G to be less secure.
Click to expand...
Click to collapse
I didn't, because I don't have it. I'm actually on a different phone and rom, and just trying to find a workaround, this is the closest thread to my problem that I found on xda. I'm using Samsung S8, and this rom: https://forum.xda-developers.com/t/rom-13-crdroid-android-9-x-for-samsung-galaxy-s8-s8-n8.4516883/

Guide:-How To Activate VoLTE,ViLTE,VoWIFI&ViWIFI LG Devices-LG Velvet 5G

Hi Guys Am Baljeet From India There Is A Path To Force Enable VoLTE On The"LG Velvet 5G LM-G900" Specifically Your Version Which Is The "LM-G900".
By Default This Feature Is Disabled On This Model.
Follow These Steps Given Below:
A). Go To The Phone App(Dailer) And Dial "*#*#4636#*#*"-It'll Automatically Bring You To The"Testing" Settings Menu.
B). Go To "Phone Information"-You See A List Of VoLTE Settings However By Default They Are Disabled And Greyed Out But Don't Worry There's A Path To Enable VoLTE.(You Will Come Back To This Menu Later)
C). Go To Your LG Smartphones's File App(File Manager) And Create a Folder Named "enable_ue"-Thats All You Need To Do Just Create The Folder, Nothing More Nothing Less.
D). Go Back To The LG Smartphone's Phone App(Dailer) And Dial "#*462633*#900#" -This Code Is Specific To The Variant And May Be Work Or Not On Other Non LM-G900 Phones. Dialing This Should Bring Up The "Hidden LG Menu"
E). Select Field Test>Universal Enabler>Create New Config-A Menu With Check Boxes For VoLTE Options Appearing
F). Select The Boxes As Follows "VoLTE" "ViLTE" "VoWifi" "ViWifi" And Finally Hit "Confirm" -A Prompt Will Appear Stating "Vo Services Updated"
G). Immediately Restart Your Smartphone To Allow The Settings To Kick In.
H). After Your Smartphone Has Restarted Go Into Your Settings>Network & Internet>Mobile Networks -If Done Correctly The VoLTE Option Will Now Be Unlocked And Available.
I). Switch On The "VoLTE"
J). Now To Double Check That Your Smartphone Now Truly Has VoLTE Enabled,Repeat Steps A&B.If Done Correctly The Menu Should Now Say "VoLTE Provisioned Video Calling Provisioned Wifi Calling Provisioned " -If These 3 Are All Switched On Then You Have Successfully Force Enabled VoLTE On Your LG Velvet 5G LM-G900, Congratulations!
Warning:-I am not responsible for any damage you made to your device You have been warned.
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Thanks a lot. A little feedback. I tried it with the 4G EU version of the phone as my current carrier deactivated VoWifi. It works with using the call code #*462633*#910# in step D.
Awesome guide. Thanks again

Baljeet Khairwal said:
Hi Guys Am Baljeet From India There Is A Path To Force Enable VoLTE On The"LG Velvet 5G LM-G900N" Specifically Your Version Which Is The "LM-G900N".
By Default This Feature Is Disabled On This Model.
Follow These Steps Given Below:
A). Go To The Phone App(Dailer) And Dial "*#*#4636#*#*"-It'll Automatically Bring You To The"Testing" Settings Menu.
B). Go To "Phone Information"-You See A List Of VoLTE Settings However By Default They Are Disabled And Greyed Out But Don't Worry There's A Path To Enable VoLTE.(You Will Come Back To This Menu Later)
C). Go To Your LG Smartphones's File App(File Manager) And Create a Folder Named "enable_ue"-Thats All You Need To Do Just Create The Folder, Nothing More Nothing Less.
D). Go Back To The LG Smartphone's Phone App(Dailer) And Dial "#*462633*#900#" -This Code Is Specific To The Variant And May Be Work Or Not On Other Non LM-G900N Phones. Dialing This Should Bring Up The "Hidden LG Menu"
E). Select Field Test>Universal Enabler>Create New Config-A Menu With Check Boxes For VoLTE Options Appearing
F). Select The Boxes As Follows "VoLTE" "ViLTE" "VoWifi" "ViWifi" And Finally Hit "Confirm" -A Prompt Will Appear Stating "Vo Services Updated"
G). Immediately Restart Your Smartphone To Allow The Settings To Kick In.
H). After Your Smartphone Has Restarted Go Into Your Settings>Network & Internet>Mobile Networks -If Done Correctly The VoLTE Option Will Now Be Unlocked And Available.
I). Switch On The "VoLTE"
J). Now To Double Check That Your Smartphone Now Truly Has VoLTE Enabled,Repeat Steps A&B.If Done Correctly The Menu Should Now Say "VoLTE Provisioned Video Calling Provisioned Wifi Calling Provisioned " -If These 3 Are All Switched On Then You Have Successfully Force Enabled VoLTE On Your LG Velvet 5G LM-G900N, Congratulations!
Warning:-I am not responsible for any damage you made to your device You have been warned.View attachment 5704625View attachment 5704627View attachment 5704629View attachment 5704631View attachment 5704633View attachment 5704635View attachment 5704637
Click to expand...
Click to collapse
Hy, code mentioned in point A does not work on my phone. Code in point D worked.but i do not have Field test option. I have attached the screenshot.please check

You can try by flashing European firmware LM-G900EM in your LM-G900N by using following method provided in the link.I am not responsible if any damage occurs.
Post in thread 'Firmware Switch' https://forum.xda-developers.com/t/firmware-switch.4307817/post-87450935

ch0c0lateb0yctg said:
Hy, code mentioned in point A does not work on my phone. Code in point D worked.but i do not have Field test option. I have attached the screenshot.please check
Click to expand...
Click to collapse
You Can try this *#546368#*900# To Get Field test.Please Tell me What happens With all screenshots.

i tried it with lg velvet 5g tmobile version LG Velvet 5G LM-G900-tm but after restart the volte option is not there in jio 4g network options, its still grey in volte provisioninig. please help.

i have followed your steps in sequence, restarted the phone. in master config its all showing green but volte provisioning is disabled and in network settings i am not seeing volte.

Sindaugh said:
Thanks a lot. A little feedback. I tried it with the 4G EU version of the phone as my current carrier deactivated VoWifi. It works with using the call code #*462633*#910# in step D.
Awesome guide. Thanks again
Click to expand...
Click to collapse
Please Share Screenshots of hidden menu of your Velvet LM-G910EMW showing Rat Selection & 5G Frequency Bands in the hidden menu.Please Share All Screenshots regarding Rat Selection&5G Frequency Bands.

First You See Volte Option or not.
abeykp said:
i have followed your steps in sequence, restarted the phone. in master config its all showing green but volte provisioning is disabled and in network settings i am not seeing volte.
Click to expand...
Click to collapse

Baljeet Khairwal said:
First You See Volte Option or not.
Click to expand...
Click to collapse
no i am not seeing volte option in settings > network >

So this worked for me, but how can I tell if it is actually making calls via VOLTE? It looks like my 4g velvet still drops to 3g for calls on T mobile?

Hi,
I have the Lg velvet G900um10h, im trying to use in europe, its bought from the US, and its at&t,.
I followed your instructions, the volte doesnt show on network, and im not able to enable it either, it says on
field test that volte is on. What should i do? ive been trying to make this phone work for a long time.

Hello bro mine is unlocked AT&T, right now mobile data is working. Unable to call.
Did all the steps as mentioned by you.
But after rebooting VoLTE not appearing.
Kindly help.
Model LM-G900UM

Thanks so much friend. With your guidance, you got VoLTE working with my carrier.

I have no field test option in my lg velvet g900n and *#*#4636#*#* code is not working.. what can i do? Someone help!

saidul7 said:
I have no field test option in my lg velvet g900n and *#*#4636#*#* code is not working.. what can i do? Someone h
Click to expand...
Click to collapse
*#*#4636#*#* //.///
Try this.

Chyt said:
*#*#4636#*#* //.///
Try this.
Click to expand...
Click to collapse
I have LF Velvet 5G Japanese version unlocked to DOCOMO. MOdel is L52-A. What code should I use to enter hidden menu?

I have LF Velvet 5G Japanese version unlocked to DOCOMO. MOdel is L52-A. What code should I use to enter hidden menu?

anujsingapore said:
I have LF Velvet 5G Japanese version unlocked to DOCOMO. MOdel is L52-A. What code should I use to enter hidden menu?
Click to expand...
Click to collapse
#*462633*#900#
theoretically...

Thanks, but the / and . Options are not available with my keypad, and the 900 option followed by # doesn't yield anything, the screen status there at the dial pad.