LG G4 weird 4G problem - G4 Q&A, Help & Troubleshooting

Hello, I have a G4 H815 with some weird problem. Anytime it connects to 4G network is unstable, dropping and coming back. I have tried with 2 different providers, with 3 different stock roms LP, MM and Nougat. APN's are set correct. I have entered Hidden menu and there Engeenering mode, and there I was watching that 4G qpes quickly from B3 to B20 (LTE bands supported in my country) and also goes to B0 (???) and vice versa. It seems that 4G is most stable when is on B3, and that is dropping down when on B20 or B0 (??) When it's connected on 3G (H+) there is no problem and the network is stable. My wife have same H815 without problems, and I have watched Engeenering mode her phone stays stable on B3, and it doesn't change bands so often. Anyone can tell me some solution? Thanks.

So I have managed to downgrade to Lollipop, rooted the phone, installed Network Signal Guru, and then with that APP to disable all other networks except B3, and now phone works as it should. So I think the problem was B20 (800 mhz), but I'm not sure why.

scytalemk said:
So I have managed to downgrade to Lollipop, rooted the phone, installed Network Signal Guru, and then with that APP to disable all other networks except B3, and now phone works as it should. So I think the problem was B20 (800 mhz), but I'm not sure why.
Click to expand...
Click to collapse
Its likely your network provider operates on more than one band for 4G
You could set it to 3G, or like you did disable the band

Network Problem Solved!!!
sometimes no network problem solved!!!
1) i am using g4 f500k which had weird network\signal problem. i've tried many options but no success. Finally I dial 5457#*500# got into WCDMA service menue>MPTCP settings>MPTCP Congestion change and select ''OLIA''. That completely solved my problem with no more network issue. If you have a deferent varient follow this dial code 5457#*your model# hope this would work.
2) also select WCDMA chanel into "user"

Solved!!!!
scytalemk said:
Hello, I have a G4 H815 with some weird problem. Anytime it connects to 4G network is unstable, dropping and coming back. I have tried with 2 different providers, with 3 different stock roms LP, MM and Nougat. APN's are set correct. I have entered Hidden menu and there Engeenering mode, and there I was watching that 4G qpes quickly from B3 to B20 (LTE bands supported in my country) and also goes to B0 (???) and vice versa. It seems that 4G is most stable when is on B3, and that is dropping down when on B20 or B0 (??) When it's connected on 3G (H+) there is no problem and the network is stable. My wife have same H815 without problems, and I have watched Engeenering mode her phone stays stable on B3, and it doesn't change bands so often. Anyone can tell me some solution? Thanks.
Click to expand...
Click to collapse
Settings>battery and power savings>battery percentage on the status bar> off
Let me know if it worked for you.

Related

[Q] LG G3 D855 LTE issue problem in UK

Hello
I have just got a LG G3 D855 from Asia. and the item can't find the LTE network. only work on WCDMA & GSM. any one have that problem and how can fix it
Lun
lunlun99 said:
Hello
I have just got a LG G3 D855 from Asia. and the item can't find the LTE network. only work on WCDMA & GSM. any one have that problem and how can fix it
Lun
Click to expand...
Click to collapse
You probably have the wrong band version i maybe wrong
jaythenut said:
You probably have the wrong band version i maybe wrong
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Click to collapse
the box mention phone supporting LTE 700/800/900/1800/2100/2300/2600. it isn't wrong band version.
lunlun99 said:
the box mention phone supporting LTE 700/800/900/1800/2100/2300/2600. it isn't wrong band version.
Click to expand...
Click to collapse
That's strange then maybe put this in the dialer 3845#*855# and see if it is activated
jaythenut said:
That's strange then maybe put this in the dialer 3845#*855# and see if it is activated
Click to expand...
Click to collapse
what's activated mean ?
jaythenut said:
That's strange then maybe put this in the dialer 3845#*855# and see if it is activated
Click to expand...
Click to collapse
what's activated mean ? and it's show up Connection problem or invalid MMI code
lunlun99 said:
what's activated mean ?
Click to expand...
Click to collapse
If you have 4G it will say under band i think
And you do have 4G contract with your carrier
Yes. the SIM work my other phone in LTE network
jaythenut said:
If you have 4G it will say under band i think
And you do have 4G contract with your carrier
Click to expand...
Click to collapse
I'm having the same problem with Three UK, no 4G. Although 4G worked on my Lumia 1020 with the same SIM a few days ago.
If I go into the hidden menu under LTE you can set it to use LTE and it connects to 4G brefiely then goes back to 3G and it never shows GSM/ WCDMA / LTE auto in the mobile networks menu, just GSm / WCDMA auto.
I noticed on the demo unit in a Three store that the phones software version was V10a-EUR-XX whereas mine is V10g-HKG-XX.
lewisco said:
I'm having the same problem with Three UK, no 4G. Although 4G worked on my Lumia 1020 with the same SIM a few days ago.
If I go into the hidden menu under LTE you can set it to use LTE and it connects to 4G brefiely then goes back to 3G and it never shows GSM/ WCDMA / LTE auto in the mobile networks menu, just GSm / WCDMA auto.
I noticed on the demo unit in a Three store that the phones software version was V10a-EUR-XX whereas mine is V10g-HKG-XX.
Click to expand...
Click to collapse
if you have root you can try deleting (or renaming) LTE Config.apk from /system/app
Lennyuk said:
if you have root you can try deleting (or renaming) LTE Config.apk from /system/app
Click to expand...
Click to collapse
Is there anything that can be done without root? I've tried setting the LTE in the hidden services menu and it connects foe a few seconds and then goes back to HSDPA. If seeting to LTE only it stays on LTE but not sure how it will work if I leave 4G coverage? I've also enabled fast dormancy but that doesn't seem to help.
There was a discussion about this in the UK thread, some phones came with 4G deactivated (on the 800MHz band used by 3 and Vodafone) that had to be activated at every boot. Replacing it fixed the problem as its not supposed to happen. But since the phone is from Asia who knows. Im not sure if flashing the eur version of the rom would work?
lewisco said:
Is there anything that can be done without root? I've tried setting the LTE in the hidden services menu and it connects foe a few seconds and then goes back to HSDPA. If seeting to LTE only it stays on LTE but not sure how it will work if I leave 4G coverage? I've also enabled fast dormancy but that doesn't seem to help.
Click to expand...
Click to collapse
fast dormancy is a network dependant setting that has nothing to do with the generation of signal you are receiving.
The only other option you have is to try and flash another firmware version.
Lennyuk said:
fast dormancy is a network dependant setting that has nothing to do with the generation of signal you are receiving.
The only other option you have is to try and flash another firmware version.
Click to expand...
Click to collapse
Can you recommend which FW to use?
Same here d855 version 3gb ram from Hong Kong no lte in the settings
stinkypoo said:
Same here d855 version 3gb ram from Hong Kong no lte in the settings
Click to expand...
Click to collapse
LTE will work from the hidden menu, or download 4G switcher from the Play store which will take you to the menu also. Just change it to LTE/GSM/WCDMA and it will work on the 4G network (at least on 3 UK). LG UK support will not help as it came from HK. I still want to know if I can flash a Euro 32GB ROM to my phone to get it working natively.
make sure u have activate your LTE with your carrier,i you have done it,and still didnt have LTE, try the hidden menu,or try 4G switch frm playstore,rooting and deleting lteconfig from system/app would be your last option (i prefer this)
Lennyuk said:
if you have root you can try deleting (or renaming) LTE Config.apk from /system/app
Click to expand...
Click to collapse
thank you, this fixed my problem!
my lte/3g/2g settings was everytime reset to 2g/3g modus when i got back to settings. i deleted lte config.apk and the .odex file, rebooted and BAM! it keeps on lte/3g/2g
Solved
I had the same issue (no LTE option in Networks configuration menu), until today: My phone installed firmware V10i-HKG-XX, and now I have the "GSM/WCDMA/LTE auto" option in Preferred Network Mode.
Cheers
LG G3 Asian D855 no 4G
lunlun99 said:
Hello
I have just got a LG G3 D855 from Asia. and the item can't find the LTE network. only work on WCDMA & GSM. any one have that problem and how can fix it
Lun
Click to expand...
Click to collapse
Do the following -
1. From the dailer, type in 3845#*855#
2. Select LTE Only
3. Modem Setting
4. RAT Selection
5. GSM/WCDMA/LTE Auto
You should now receive 4G but everytime you reboot, you have to repeat this procedure

g3 d850 unlocked cannot detect 3g, hsdpa or 4g lte.

hello! i have g3 d850 at&t and its unlocked but i have problems while i try to connect phone with 3g or 4g lte data, signal bar ddisappears when i force connect with wcdma or lte. gsm work well. apn is ok. o g2 i have 3g 4g lte ok, with same apn and same parameters but on g3 i can connect only with 2g or E. please help me!
Same happen to me
Kind of the same happens to me(I'm in Claro - Argentina provider) and also D855
Signal bars go when i select WCDMA only but when i go LTE/WCDMA/GSM, i do get 3G+ but after a while (dont know if its when the device goes to sleep or idk, but after 30+- minutes) the modem stop responding, i can't make calls, get them or get any data.
I havent been able to find why this happens (tried different versions modem) and roms.... any help would also be apreciated.
I get it sometimes too and for me the solution is changing the APN. Sometimes carriers have different apns like "vodafone live" and "vodafone internet". So be sure you choose the right apn settings.
ogzhnpcmn said:
I get it sometimes too and for me the solution is changing the APN. Sometimes carriers have different apns like "vodafone live" and "vodafone internet". So be sure you choose the right apn settings.
Click to expand...
Click to collapse
I tried it, didn't work either! After some time, the modem stop responding... dont get internet or the ability to get or make phone calls.

LTE Band Selection Problem (Band3, Band7)

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!

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!

LG G3 D855 - only EDGE/GPRS, no WSDMA (3G) or LTE

Hi. Have a problem with my LG G3 D855. It won't work with 3g or 4g - only EDGE/GPRS (2g). I checked on another phone - 3g works perfectly fine there. My Lg has all network bands to work in WCDMA. :crying:
So when i, for example, choose WCDMA only mode, it just loses network connection and starts to look for one. If i choose GPRS/WCDMA or GPRS/WCDMA/LTE - it works only in EDGE (2g). Again, same sim-card - different phone - no problem with 3g.
I thought maybe there is a problem with modem rom. So i upgraded my LG G3 to marshmallow via LgFlashTool. No luck - same problem. I read couple threads, where people have the same problem - seems like no solution or idea, why is this happening, whatsoever. :crying:
Will appreciate any thoughts on the subject. Thanks. :angel:

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