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Help me! LG lu 6200 lost 3G

my LG LU 6200 , I up rom of LG Su 640 , it is lost IMEI number , later I up rom again of LG LU 6200 stock ROM , it lost Imei , but I access website , it is lost 3G network, it have only G (GPRS) , I can't use 3G , I use *#*#4636#*#* go to phone information, type network : GPRS:11
and other LG LU 6200 of my friend is HSPA : 11 ( have 3G) . Please help me , thanks all . How to fix 3G LG Lu 6200 ?

duongtri81 said:
my LG LU 6200 , I up rom of LG Su 640 , it is lost IMEI number , later I up rom again of LG LU 6200 stock ROM , it lost Imei , but I access website , it is lost 3G network, it have only G (GPRS) , I can't use 3G , I use *#*#4636#*#* go to phone information, type network : GPRS:11
and other LG LU 6200 of my friend is HSPA : 11 ( have 3G) . Please help me , thanks all . How to fix 3G LG Lu 6200 ?
Click to expand...
Click to collapse
how tthat happen?

lipe082 said:
how tthat happen?
Click to expand...
Click to collapse
I think he tries to say that he flashed custom ROM, but then he flashed stock ROM and now he can't see IMEI in phone information and 3G does not work . So am i right ?
(And why are you posting here? You better try here: http://forum.xda-developers.com/forumdisplay.php?f=1445)

ashirviskas said:
I think he tries to say that he flashed custom ROM, but then he flashed stock ROM and now he can't see IMEI in phone information and 3G does not work . So am i right ?
(And why are you posting here? You better try here: http://forum.xda-developers.com/forumdisplay.php?f=1445)
Click to expand...
Click to collapse
It is right , help me!
Thanks

duongtri81 said:
It is right , help me!
Thanks
Click to expand...
Click to collapse
Do you have any recovery installed? If yes, then try go to recovery and wipe everything, do factory reset (you will lose your apps, contacts and other things in phone that you have installed, default will stay. Memory card will be untouched ) (I assume you have, because you had installed custom ROM )

ashirviskas said:
Do you have any recovery installed? If yes, then try go to recovery and wipe everything, do factory reset (you will lose your apps, contacts and other things in phone that you have installed, default will stay. Memory card will be untouched ) (I assume you have, because you had installed custom ROM )
Click to expand...
Click to collapse
i have recovery and wipe data.cache....up any Rom .but 3G don't work .it only work gprs mode.help [email protected]@

Go to settings and uncheck only use 2g network
Sent from my LG-P500 using xda app-developers app

LU6200 3G Lost
Hi.
I have same problem like that.
I have a phone LG LU6200. There was stock firmware 2.3.6 and then I flashed 167.kdz Got root and deleted some stock programs.
After restarting phone showed error "LG Security Error" and then I made a downgrade.
And saw that I lost IMEI numbers. After this I restored imei using this solution. But now on my phone another imei.
Then I flashed custom recovery. When I check only WCDMA option signal is lost. I tryed to flash stock firmware 167.kdz same problem. 3G is not working.
How can I solve this problem?

galaxy s6 network not registred

Hi guys i dont know what to do anymore.. i have big problem with my galaxy s6 g920f, no matter what i do i cant connect to mobile carrier.. after check the imei is clean not blocked i check the sim on other phone everything works good so its only the phone i have triad to put custom version few stock version include the ILO version i am from israel and the phone works good the only thing is not working is mobile data.. i have this issue before on the version 6.0 back in time i was have 5.1.1 twrp backup and i found working solution.. to restore only the radio settings and that was sole the problem! i was deleted all the twrp backup.. by mistake now i cant get any carrier connection on my phone ne matter what version what modem i will flash its not working.. i hear few phone was perches in the us have problem to connect the mobile carrier in the version 6.0.. anyone have a solution please ? i am sorry about my english..

Roi84 said:
Hi guys i dont know what to do anymore.. i have big problem with my galaxy s6 g920f, no matter what i do i cant connect to mobile carrier.. after check the imei is clean not blocked i check the sim on other phone everything works good so its only the phone i have triad to put custom version few stock version include the ILO version i am from israel and the phone works good the only thing is not working is mobile data.. i have this issue before on the version 6.0 back in time i was have 5.1.1 twrp backup and i found working solution.. to restore only the radio settings and that was sole the problem! i was deleted all the twrp backup.. by mistake now i cant get any carrier connection on my phone ne matter what version what modem i will flash its not working.. i hear few phone was perches in the us have problem to connect the mobile carrier in the version 6.0.. anyone have a solution please ? i am sorry about my english..
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Click to collapse
Have you checked that you have correct apn settings

yes that is one of the first thing i did that not solved the problem.

Samsung Galaxy S7 G930F with G930V Bootloader??

I recently bought S7 SM-G930F, but when I went into it's phone info and recovery, I saw that it has a Verizon bootloader. All the rest is of 930f. even the phone says 930f everywhere. I am not sure what this is. I am also facing some signal dropping issues, especially when I switch on to data network. I did the refurbishment check and it came out clean and original.
Can someone please guide me how to fix this? Perhaps a way to change the bootloader to that of 930F without screwing up the phone?
Please find the pics attached for reference.
Thanks in advance for the help.

pistavampire said:
I recently bought S7 SM-G930F, but when I went into it's phone info and recovery, I saw that it has a Verizon bootloader. All the rest is of 930f. even the phone says 930f everywhere. I am not sure what this is. I am also facing some signal dropping issues, especially when I switch on to data network. I did the refurbishment check and it came out clean and original.
Can someone please guide me how to fix this? Perhaps a way to change the bootloader to that of 930F without screwing up the phone?
Please find the pics attached for reference.
Thanks in advance for the help.
Click to expand...
Click to collapse
you phone is a verizon see the snapdragon chipset and the baseband version
either you have flashed a phone with G930F kernel and rom
or whoever sold this to you tried to scam you
dont flash the F bootloader
Your phone is the verizon version which are much cheaper in comparison to the unlocked exynos variants
Flash verizon rom to get back proper caLL functions

Ashwin Prabhunerurkar said:
you phone is a verizon see the snapdragon chipset and the baseband version
either you have flashed a phone with G930F kernel and rom
or whoever sold this to you tried to scam you
dont flash the F bootloader
Your phone is the verizon version which are much cheaper in comparison to the unlocked exynos variants
Flash verizon rom to get back proper caLL functions
Click to expand...
Click to collapse
Thanks for the response. I think I got scammed then. Two things though:
1) It somehow seemed to work the 1800 band for 4g, which is supported by 930F and not 930V I believe.
2) secondly, even the back of my phone says 930F .. like everything about it says 930F .. like is even the body changed??

pistavampire said:
Thanks for the response. I think I got scammed then. Two things though:
1) It somehow seemed to work the 1800 band for 4g, which is supported by 930F and not 930V I believe.
2) secondly, even the back of my phone says 930F .. like everything about it says 930F .. like is even the body changed??
Click to expand...
Click to collapse
you can get a new back which can say anything for 10$
i can't comment on the bands but this phone is verizon 100%

Hi, I have same problem too with my phone.And also i dont have option to update the phones software.
Even when i try to flash official firmware of android 7 using odin it doesnt process (say's unspported dev) and closes.
Any help will be much appreciated guys.
Thanks in advance
---------- Post added at 09:43 AM ---------- Previous post was at 09:37 AM ----------
denotegrg said:
Hi, I have same problem too with my phone.And also i dont have option to update the phones software.
Even when i try to flash official firmware of android 7 using odin it doesnt process (say's unspported dev) and closes.
Any help will be much appreciated guys.
Thanks in advance
Click to expand...
Click to collapse
Anyway to update to android 7?

denotegrg said:
Hi, I have same problem too with my phone.And also i dont have option to update the phones software.
Even when i try to flash official firmware of android 7 using odin it doesnt process (say's unspported dev) and closes.
Any help will be much appreciated guys.
Thanks in advance
---------- Post added at 09:43 AM ---------- Previous post was at 09:37 AM ----------
Anyway to update to android 7?
Click to expand...
Click to collapse
i don't have the option to update either! i'm guessing i'll face the same problem with odin, or possibly brick it when trying to flash it with Verizon rom. so not sure what to do.

denotegrg said:
Hi, I have same problem too with my phone.And also i dont have option to update the phones software.
Even when i try to flash official firmware of android 7 using odin it doesnt process (say's unspported dev) and closes.
Any help will be much appreciated guys.
Thanks in advance
---------- Post added at 09:43 AM ---------- Previous post was at 09:37 AM ----------
Anyway to update to android 7?
Click to expand...
Click to collapse
does your mobile network (signals) die randomly? especially when you turn on 4g?

pistavampire said:
I recently bought S7 SM-G930F, but when I went into it's phone info and recovery, I saw that it has a Verizon bootloader. All the rest is of 930f. even the phone says 930f everywhere. I am not sure what this is. I am also facing some signal dropping issues, especially when I switch on to data network. I did the refurbishment check and it came out clean and original.
Can someone please guide me how to fix this? Perhaps a way to change the bootloader to that of 930F without screwing up the phone?
Please find the pics attached for reference.
Thanks in advance for the help.
Click to expand...
Click to collapse
I would run ur serial or imei number through one of the websites see if what it really is I have actually been able.to flash different system roms and basebands and yet the phone works

pistavampire said:
i don't have the option to update either! i'm guessing i'll face the same problem with odin, or possibly brick it when trying to flash it with Verizon rom. so not sure what to do.
Click to expand...
Click to collapse
Hi again.I tried flashing with verizon nougat firmware and guess what it worked perfectly.??
Also got to a conclusion that our sets were refubrished ones.
Good luck if u are gonna try to update too.

denotegrg said:
Hi again.I tried flashing with verizon nougat firmware and guess what it worked perfectly.??
Also got to a conclusion that our sets were refubrished ones.
Good luck if u are gonna try to update too.
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Click to collapse
awesome. can you also direct me which exact rom your downloaded and flashed? I simply have to load it into odin and flash right? any specific instructions?
and is it all bloated with Verizon apps and Verizon startup now?

miko12312 said:
I would run ur serial or imei number through one of the websites see if what it really is I have actually been able.to flash different system roms and basebands and yet the phone works
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Click to collapse
which site? can you please help check these out:
The IMEI is mod edit PLEASE DO NOT POST IEMIs
the serial number is (in the about phone option), although back of my phone says S/N: , but I think the back might be fake if it's a Verizon!

pistavampire said:
awesome. can you also direct me which exact rom your downloaded and flashed? I simply have to load it into odin and flash right? any specific instructions?
and is it all bloated with Verizon apps and Verizon startup now?
Click to expand...
Click to collapse
I flashed S7 Verizon Sm930v Android 7.
Firmware - G930VVRS4BQC9
Process is simple if u know how to use odin its like regular flash.
And yes this firmware comes with all the verizon bad stuffs but good thing is that most of them can be disabled.I wouldnt care if i wanted to use Nought on my phone.
Still network signal is poor though.

denotegrg said:
I flashed S7 Verizon Sm930v Android 7.
Firmware - G930VVRS4BQC9
Process is simple if u know how to use odin its like regular flash.
And yes this firmware comes with all the verizon bad stuffs but good thing is that most of them can be disabled.I wouldnt care if i wanted to use Nought on my phone.
Still network signal is poor though.
Click to expand...
Click to collapse
But does the network signal break (get disabled) as it does for me in this converted phone?

pistavampire said:
which site? can you please help check these out:
The IMEI is
the serial number is (in the about phone option) , although back of my phone says S/N: , but I think the back might be fake if it's a Verizon!
Click to expand...
Click to collapse
The imei comes up as Sprint the serail is fake

pistavampire said:
which site? can you please help check these out:
The IMEI is 3555 0107 0413 313
the serial number is (in the about phone option) f770631d, although back of my phone says S/N: R58H21XMRNL, but I think the back might be fake if it's a Verizon!
Click to expand...
Click to collapse
I suggest flash a u firmware and then use it like that it will unlock it ,but there are fake s7 s

miko12312 said:
The imei comes up as Sprint the serail is fake
Click to expand...
Click to collapse
more surprises. damn. but hey thank you for this. can you please tell me which site you used to check this?

so I successfully managed to flash the Verizon rom. Now my question is, can we altogether remove Verizon and have some debloated or 930f bootloader/rom instead? I saw one video where he converts 930v to 930f but he gave no links to the files he used.

pistavampire said:
more surprises. damn. but hey thank you for this. can you please tell me which site you used to check this?
Click to expand...
Click to collapse
Swappa.com

denotegrg said:
I flashed S7 Verizon Sm930v Android 7.
Firmware - G930VVRS4BQC9
Process is simple if u know how to use odin its like regular flash.
And yes this firmware comes with all the verizon bad stuffs but good thing is that most of them can be disabled.I wouldnt care if i wanted to use Nought on my phone.
Still network signal is poor though.
Click to expand...
Click to collapse
I flashed this rom but my network issue is still there, it just got 'x' and gives me the error of no connectivity. Happens mostly when I turn on the data, and just doesn't come back.

pistavampire said:
I flashed this rom but my network issue is still there, it just got 'x' and gives me the error of no connectivity. Happens mostly when I turn on the data, and just doesn't come back.
Click to expand...
Click to collapse
You can try what helped me: https://forum.xda-developers.com/showpost.php?p=72692072&postcount=3
It's a ROM without branding and it still works quite nice

help needed, unbricked mate 8 and debranded still showing wrong version

Hi all,
I was running a custom ROM for a while (KangVIP) and decided to revert back to stock. I missed it up and I bricked it. so kept trying several methods and finally managed to make it work via dc-unlocker. However initially I wasn't sure which was my original stock rom version. I'm in the middle east so I tried all the different nxt-l29c185xxx versions. nothing worked out, so I tried the second method of dc-unlocker using NXT-AL10 factory firmware and the phone worked. so I debranded the phone using SRKTools, then I flashed different l29c185 stock roms and it seemed that it worked out. However the issue I'm facing now is I'm getting SIM network unlock message when restarting, which shouldn't be the case since the phone originally is unlocked when bought. so I checked through the manufacturer mode and the Bootloader version there shows NXT-C900B120-fastboot
I'm not sure what this means. I tried several ROMs using SRKTools and ItalianKnife and still this didn't change although the build number in the phone changes.
any ideas how to completely revert this back?
appreciate your help

any suggestions..... things I should try??

Yasa98 said:
any suggestions..... things I should try??
Click to expand...
Click to collapse
Hi.
As you said you are on B200 so your phone is marshmallow and it is good because SRKtool just can rebrand Marshmallow version.
My suggestion is to use SRKtools and rebrand your phone to correct brand (NXT-L29C636 or NXT-L29C185)
If you do it correctly, I bet it will work.
Have a nice time.

afromoh said:
Hi.
As you said you are on B200 so your phone is marshmallow and it is good because SRKtool just can rebrand Marshmallow version.
My suggestion is to use SRKtools and rebrand your phone to correct brand (NXT-L29C636 or NXT-L29C185)
If you do it correctly, I bet it will work.
Have a nice time.
Click to expand...
Click to collapse
many thanks for your reply.
I tried SRKtools again following the guide and still it isn't working. I still get the Sim lock message and the factory bootloader version NXT-C900B120_fasboot

Yasa98 said:
many thanks for your reply.
I tried SRKtools again following the guide and still it isn't working. I still get the Sim lock message and the factory bootloader version NXT-C900B120_fasboot
Click to expand...
Click to collapse
Hi.
Would you please tell me which vesrion is in setting about ??

afromoh said:
Hi.
Would you please tell me which vesrion is in setting about ??
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Click to collapse
I've used dc-unlocker to get passed the unlock code. Now I have the phone on L29C185B520; however everything in the phone is working perfectly except the sim; there is totally no signal. I have checked the sim in other phones and it's working fine.
I took the phone to a Huawei repair center and they said its a problem with the mainboard which needed to be changed and it'll cost around $200 USD
I believe it's a problem of modemvm partitions. is there a way to fix it?

Need Solutions For Sony Xperia XZ SOV34 With No Service Carrier

Hi everybody,
I still have a problem with my carrier signal.
1. Sony XZ SOV34 has SIM unlocked
2. Already unlocked bootloader
3. Using Global ROM and already using ExistenZ Oreo
The problem that makes me confused is imei and baseband, there is no problem, but the sim carrier cannot register.
From this problem what should I do?

Hello can you check your apn settings for your operator? If they are all setup correctly try selecting network manually.
Note: You need to search your own mobile operator's apn settings I can't really help with that.

oguzbatu said:
Hello can you check your apn settings for your operator? If they are all setup correctly try selecting network manually.
Note: You need to search your own mobile operator's apn settings I can't really help with that.
Click to expand...
Click to collapse
You see my attach i can't write access APN and my Fido keys is not provisioned but safetynet its ok. So what i should do now?
Thank you

seyrarms said:
You see my attach i can't write access APN and my Fido keys is not provisioned but safetynet its ok. So what i should do now?
Thank you
Click to expand...
Click to collapse
Fido keys doesn't matter for network connectivity. Since you can't setup APN thats the reason it is not connecting. Are you sure that you are not running dual sim version of Xperia XZ? Can you also try tp flash stock rom without exitenz mods? To see if it changes anything.

oguzbatu said:
Fido keys doesn't matter for network connectivity. Since you can't setup APN thats the reason it is not connecting. Are you sure that you are not running dual sim version of Xperia XZ? Can you also try tp flash stock rom without exitenz mods? To see if it changes anything.
Click to expand...
Click to collapse
My Xperia XZ single sim not dual idk what happen with this. Since i unlock this bootloader from tool S1 Network tool
My sim carries change to "No Services". I'm tried to re flash back to Japan rom and back again to global rom but same just "no service"

seyrarms said:
My Xperia XZ single sim not dual idk what happen with this. Since i unlock this bootloader from tool S1 Network tool
My sim carries change to "No Services". I'm tried to re flash back to Japan rom and back again to global rom but same just "no service"
Click to expand...
Click to collapse
Can you try to flash your device with Sony's emma tool and see if it works. If it doesn't fix I don't know what will because this doesn't seem something about software nothing like this happened to anybody I assume.

oguzbatu said:
Can you try to flash your device with Sony's emma tool and see if it works. If it doesn't fix I don't know what will because this doesn't seem something about software nothing like this happened to anybody I assume.
Click to expand...
Click to collapse
Ok i will try

After flashing the firmware..Try to reflash baseband(modem) only..I got this problem back then when i downgrade to marshmallow..and update to nougat via OTA...i lost baseband and imei number...but it's all fixed after i reflash baseband..
NOTE:BASEBAND MUST BE THE SAME AS YOUR ANDROID VERSION!!!

oguzbatu said:
Can you try to flash your device with Sony's emma tool and see if it works. If it doesn't fix I don't know what will because this doesn't seem something about software nothing like this happened to anybody I assume.
Click to expand...
Click to collapse
Thank you sir my signal is back. I'm use tool EFS Profesional can give back again
Roowz said:
After flashing the firmware..Try to reflash baseband(modem) only..I got this problem back then when i downgrade to marshmallow..and update to nougat via OTA...i lost baseband and imei number...but it's all fixed after i reflash baseband..
NOTE:BASEBAND MUST BE THE SAME AS YOUR ANDROID VERSION!!!
Click to expand...
Click to collapse
Thanks sir

Just follow one of these Guides...
If U have Unlock Code for Network:
If not try this. It's not easy but works:
I can't post links here. PM me if you still need help
If your baseband and IMEI has gone just flash the 39.0.C.0.282 AU either with flashtool. Better option is xflasher
seyrarms said:
Thank you sir my signal is back. I'm use tool EFS Profesional can give back again
Thanks sir
Click to expand...
Click to collapse