Develop Bugs

3G issue

are stock recovery and boot files same for all regional versions of ruu. Please ans me. I am having problem afterrevert back to ruu. 3G net work stop working and I can't use 3g internet. Please help, if anyone knows about it.

mahedi_aiub said:
are stock recovery and boot files same for all regional versions of ruu. Please ans me. I am having problem afterrevert back to ruu. 3G net work stop working and I can't use 3g internet. Please help, if anyone knows about it.
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Are you able to use 2G atleast? Did you check the APN settings for your carrier?

basappa said:
Are you able to use 2G atleast? Did you check the APN settings for your carrier?
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Yes, I can use 2G. I checked apn settings. When I select WCDMA only, network just goes off. but when GSM or WCDMA Preffered is selected, then only 2G starts.

[SOLVED] Can't get 4G/LTE after restoring

Hey all. I'm currently running a D855V (Australian model) rooted on stock Android 4.4.2.
So I recently upgraded to Lollipop but couldn't use it fully due to issues with some other software of mine. So I used the KDZ method to flash back to 10E. Since then I've lost all 4G/LTE on my phone.
I've tried changing the networking mode inside the mobile network settings from GSM/WCDMA to GSM/WCDMA/LTE but once selected my entire mobile network will drop. From there it will regain network connectivity for about 10 seconds (minus any data connection) and then drop off again, showing no network. It will continue to do this until I change the network type back to GSM/WCDMA or reboot (which defaults the connectivity method back to GSM/WCDMA anyway). I tried flashing the 10C firmware too (for Australia) but this will do the exact same thing.
I've also tried changing the LTE RAT settings inside the hidden menu to GSM/WCDMA/LTE and it still won't connect. It will drop the network like the previous method but will then reconnect only with a HSDPA connection rather than 4G/LTE.
I've checked the SIM card in another phone and it works fine with 4G/LTE. I've also checked my IMEI and it shows that I do have one so I can rule that out. Right now I"m at a loss. I'm thinking I need to flash a new radio or baseband but I can't find any info about that from any of the other threads I've read.
Any info at this stage would be great as it sucks having the 2nd best 4G speeds in the world and not being able to use them.
Cheers all.
EDIT: Resolved it by flashing KK modem/baseband. Thanks to JDr0iD for the suggestion. Turns out the KK and LP basebands are done differently. Figures considering the massive overhaul they've done with it. Anyway the modem can be found here - https://mega.co.nz/#!61QBVS5B!pa2xdGyeWAJKyAazkz9O8qc5b9hJOpxX5kaU_aFdjq4

potplanty said:
Hey all. I'm currently running a D855V (Australian model) rooted on stock Android 4.4.2.
So I recently upgraded to Lollipop but couldn't use it fully due to issues with some other software of mine. So I used the KDZ method to flash back to 10E. Since then I've lost all 4G/LTE on my phone.
I've tried changing the networking mode inside the mobile network settings from GSM/WCDMA to GSM/WCDMA/LTE but once selected my entire mobile network will drop. From there it will regain network connectivity for about 10 seconds (minus any data connection) and then drop off again, showing no network. It will continue to do this until I change the network type back to GSM/WCDMA or reboot (which defaults the connectivity method back to GSM/WCDMA anyway). I tried flashing the 10C firmware too (for Australia) but this will do the exact same thing.
I've also tried changing the LTE RAT settings inside the hidden menu to GSM/WCDMA/LTE and it still won't connect. It will drop the network like the previous method but will then reconnect only with a HSDPA connection rather than 4G/LTE.
I've checked the SIM card in another phone and it works fine with 4G/LTE. I've also checked my IMEI and it shows that I do have one so I can rule that out. Right now I"m at a loss. I'm thinking I need to flash a new radio or baseband but I can't find any info about that from any of the other threads I've read.
Any info at this stage would be great as it sucks having the 2nd best 4G speeds in the world and not being able to use them.
Cheers all.
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Hey mate. Do you think modem is still linked to lollipop? Try another modem or restore EFS to see if makes a difference
Sent from my LG-D855 using XDA Free mobile app

think it might be an lteconfig issue?

LG G3 D851 shows full bar signals but no service

Hey guys i'm having some problems with my lg g3 d851, since the screen of my beloved lg g2 died after 2 years and a half, my friend gave me his lg g3 to use it as a tablet since the phone doesnt recognize any signal at all, right now is running the stock rom for android marshmallow, everything works fine except for the signal that either always keeps in "no service", i already try to put another sim card on the phone and its showing the same problem, already checked the IMEI on the swappa blacklist and everything is okay, here are a few screenshots, any thoughts on how to solve this problem would be very appreciated thank you!

Have you modified the APN settings under mobile networks?

kfcherry said:
Have you modified the APN settings under mobile networks?
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hi thanks for replying, yeah i already modified the APN settings under mobile networks with the APN of my carrier that is IUSACELL (AT&T México) and is still showing the same problem "no service" or "searching"

I had the same problem, try installing another modem, or send me an pm, I have the same mobile company (right now I'm having some problems with the at&t mexico)

I am having a similar problem with my d851 30g. It isvnot rooted and running stock android 6.0 tmobile rom. I am with movistar (mexico) it will have signal and be on the network and then eject the sim saying invalid then reset. Did factory reset. Movistar sim worked for about an hour and then same thing. Have a s from telcel switched and no problem till this Morning. Did the same thing and restarted. Recognized the sim and all fine. I am new to this and could use a little help. As it is connecting with the other sim and not my movistar sim. Possible software issue or corrupted sim?
Thanks in advance,
Alex miller

My G928T (unlocked) cannot receive 3G, only 2G works

Please my G928T (unlocked) using internationaly, suddenly cannot no longer receive 3G network, can only reveive 2G/Edge. Once i set it to 3G only, the network will go and I will be off Network. But 3G use to work before now.
I have flashed the default most recent firmware (G28TUVU4DQC2) from sammobile yet it didn't work.
Pls I need help.
Thanks

Hi, I'm in the same situation, did you find a solution?

sunnycee said:
Please my G928T (unlocked) using internationaly, suddenly cannot no longer receive 3G network, can only reveive 2G/Edge. Once i set it to 3G only, the network will go and I will be off Network. But 3G use to work before now.
I have flashed the default most recent firmware (G28TUVU4DQC2) from sammobile yet it didn't work.
Pls I need help.
Thanks
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Have you tried changing SIM Cards?
What about booting to recovery and performing a factory reset?

improve network

How can I improve my network quality,
As I saw 3g network of same carrier in my custom ROM and 4g network of same carrier in others standard phone?

Joybiswas19 said:
How can I improve my network quality,
As I saw 3g network of same carrier in my custom ROM and 4g network of same carrier in others standard phone?
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Click to collapse
(Take a Backup before doing anything)
First of all check check your base band version (Phone Settings-> Info)
if you are not on the latest version(2 different versions Chinese or Indian).
i not i would suggest you to download any version of your choice and then flash it.
once you are done with all of that. now comes the main part.
you have to now enable volte on the stock rom and try using it for 5- 10 mins and check if u get 4g network, else check you sim card to see if it is 3g or a 4g sim.
if a 3g sim, then just get the sim upgraded. (should consider doing this first). else you would have seen 4g network,thats all . follow all steps to root and unlock the bootloader.
Thats all any rom you would have 4g