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[Q] Mobile Network error after flashing a kernel.Need Help!!!

I was using Liquidsmooth rom and flashed a kernel (Lean kernal) and when I reboot my phone, there's no signal and I can't call anyone. It keeps saying Mobile Network Error. Can someone help me solve this problem?

!!ALL QUESTIONS GO IN THE Q&A FORUM!! OR THEY MAY BE DELETED!!
Check your IMEI is correct .
See stickied faqs and guides EFS/ IMEI post

Link to the kernel you flashed please.....don't recognize that name as being an i9300 kernel?

Baseband Unknown and no IMEI number

Hi All
I have the following error on my Samsung Galaxy Note 3 Exynos (N900).
My phone was rooted and Ive been running a custom ROM. Now I want to go back to stock but when I load any stock rom I get the Baseband Unknown and no IMEI number problem.
I have tried
* 4 different stock roms - same issue
* flashed separate modem driver - same issue
* restored EFS folder/partition - same issue
The only way I can get it to work again is by loading the custom ROM (http://forum.xda-developers.com/showthread.php?t=2503206).
Seeing as the custom ROM works and everyone says the problem is with the EFS folder. I backed up the EFS folder with Custom Rom loaded and restored the EFS folder with stock ROM loaded. Still the same issue - Baseband Unknown and no IMEI number.
I know there are a lot of posts regarding this issue and all seem to point to the EFS folder. Mine however doesnt seem to be a EFS folder issue.
Any other ideas?
Just FYI I also ran the KNOX warranty reset (not sure if this is relevant)
Thank you
Morne

Only thing that fixed my phone with that same issue was SPT box. Ask your local repair shop

I had unknown baseband and null imei yesterday on my N9005 after flashing stock rom using Odin. After 5 hours trying to find a solution I almost lost hope but then I tried flashing a other modem and it worked Phone works now and I have been using it all day.
The modem I flashed is CP_N9005XXUFNG2
I flashed it on N9005XXUEND5 (Nordic)
So my tip for you is to try find a different modem for your phone and flash it using Odin
Hope it helps

fredrik8 said:
I had unknown baseband and null imei yesterday on my N9005 after flashing stock rom using Odin. After 5 hours trying to find a solution I almost lost hope but then I tried flashing a other modem and it worked Phone works now and I have been using it all day.
The modem I flashed is CP_N9005XXUFNG2
I flashed it on N9005XXUEND5 (Nordic)
So my tip for you is to try find a different modem for your phone and flash it using Odin
Hope it helps
Click to expand...
Click to collapse
I'm downloading some other modem drivers now. Thanks
Will let you know if this helped

I tried all of the following modems:
N900_DDUBMI3_MODEM
N900_DDUBMI4_MODEM
N900_DXUBMI1_MODEM
N900_UBUBMI2_MODEM
N900_XXUBMI2_MODEM
Still the same issue

morne4444 said:
I tried all of the following modems:
N900_DDUBMI3_MODEM
N900_DDUBMI4_MODEM
N900_DXUBMI1_MODEM
N900_UBUBMI2_MODEM
N900_XXUBMI2_MODEM
Still the same issue
Click to expand...
Click to collapse
The working custom rom has XXUENE1 as the modem, Im trying to find it and test with stock rom

morne4444 said:
The working custom rom has XXUENE1 as the modem, Im trying to find it and test with stock rom
Click to expand...
Click to collapse
I cant find that modem on its own

N9005 LTE 32GB sama IMEI null and unkown baseband
I did what you did with my N9005. i am trying different modems also still same (
a question to fix it but not sure..
did you thicked " phone bootloader update " during stock rom installation ?
I am not an expert, I just read somewhere on XDA to install 4.4.2 stock rom with ticked .i plan to try it before try just wanna ask you

ohayyam said:
I did what you did with my N9005. i am trying different modems also still same (
a question to fix it but not sure..
did you thicked " phone bootloader update " during stock rom installation ?
I am not an expert, I just read somewhere on XDA to install 4.4.2 stock rom with ticked .i plan to try it before try just wanna ask you
Click to expand...
Click to collapse
I havent tried it

morne4444 said:
I havent tried it
Click to expand...
Click to collapse
i am going to try now... i will inform you soon...
I could not select to thick phone bootloader update, during stock rom installation.
We have to find necessary files sperately to correct what we did wrong, and during normal stock installation damaged side does not rewritten that results still imei null and basband unkown (
1-) i try stock rom with pit files 718 and 805 eur open 32GB for N9005 but not fixed..
2-) Tried different modems on different stock or custom roms ...
Now time to find BOOTLOADER FILES TO INSTALL WITH ODIN )

Not sure this would help but have you tried a Factory Reset with clearing all cache's? If it works then try reflashing your stock saved ROM over it to regain all your apps.

Here is what happend.
The rom I was using before I got unknown baseband and null imei was N9005XXUFNF4. Note, this is the latest UK rom. I then flashed a Nordic rom that was available at that time which was N9005XXUEND5. Note, this rom is older and uses an older modem than N9005XXUFNF4. This caused unknown baseband and null imei for me.
The reason why I flashed in the first place was because I'm from Sweden and the new update that N9005XXUFNF4 had was available OTA on N9005XXUEND5 rom.
The latest Nordic rom that I downloaded from sammobile is N9005XXUFNG2. Note, this rom uses N9005XXUFNG2 modem, the same modem I flashed on N9005XXUEND5.
Problem now is that I can't receive OTA because it now thinks that I got the latest update already because I got the latest modem installed.
I flashed latest Nordic rom N9005XXUFNG2 today and everything is working fine now.

fredrik8 said:
Here is what happend.
The rom I was using before I got unknown baseband and null imei was N9005XXUFNF4. Note, this is the latest UK rom. I then flashed a Nordic rom that was available at that time which was N9005XXUEND5. Note, this rom is older and uses an older modem than N9005XXUFNF4. This caused unknown baseband and null imei for me.
The reason why I flashed in the first place was because I'm from Sweden and the new update that N9005XXUFNF4 had was available OTA on N9005XXUEND5 rom.
The latest Nordic rom that I downloaded from sammobile is N9005XXUFNG2. Note, this rom uses N9005XXUFNG2 modem, the same modem I flashed on N9005XXUEND5.
Problem now is that I can't receive OTA because it now thinks that I got the latest update already because I got the latest modem installed.
I flashed latest Nordic rom N9005XXUFNG2 today and everything is working fine now.
Click to expand...
Click to collapse
Thanks man.
I went from the stock rom that the phone came out with in South Africa to a Russian Rom (latest version) to a custom ROM. I came right by installing N900XXUENG1_N900ODDENF1_INS (India), it is the latest version available and it worked !!!!
Problem Resolved

morne4444 said:
Thanks man.
I went from the stock rom that the phone came out with in South Africa to a Russian Rom (latest version) to a custom ROM. I came right by installing N900XXUENG1_N900ODDENF1_INS (India), it is the latest version available and it worked !!!!
Problem Resolved
Click to expand...
Click to collapse
Nice

fredrik8 said:
Nice
Click to expand...
Click to collapse
Thanks for the help and suggestions !

morne4444 said:
Thanks for the help and suggestions !
Click to expand...
Click to collapse
You're welcome

My N9005 32GB story little bit unkown.
It is Stupid Story but i did not check original rom was 4.3 or 4.4.2 ??? Because i got 2 new phones from my friends to make root and install custom ROM. One of them was 4.4.2 rom that i was sucessfully root and install omega20 ROM. I suppose both phone was same and did not checked second one then when i was installing 4.4.2 CWM KK files with ODIN phone was freeze and fail !!!
I tried many stock roms and custom roms some recovery fix scripts etc. etc. Finally i start to use Mirek's method till adb commands... Last thing that i could not success to check Mirek's method is good for my phone... Last step was writing serial number IMEI no to dev block but i could not do it...Because of my adb knowledge nothing. I did many things blindly ) let me do try and see the results...
Let's forget about past. Please advice me what should i do now to try to fix the phone.
Final status is ROM installed stock SEE ROM and my CSC now EUR but still imei null and unknown baseband... AP:N9005XXUFNG2 , CSC:N9005OXXFNG2
I am sure that the phone info shows original CSC EUR, this phone was XSI. During the custom rom installation CSC was changed. ( sweet rom can change CSC code, during aroma installation asking to select CSC ).
Any advice ?
Thanks and Regards.

ohayyam said:
My N9005 32GB story little bit unkown.
It is Stupid Story but i did not check original rom was 4.3 or 4.4.2 ??? Because i got 2 new phones from my friends to make root and install custom ROM. One of them was 4.4.2 rom that i was sucessfully root and install omega20 ROM. I suppose both phone was same and did not checked second one then when i was installing 4.4.2 CWM KK files with ODIN phone was freeze and fail !!!
I tried many stock roms and custom roms some recovery fix scripts etc. etc. Finally i start to use Mirek's method till adb commands... Last thing that i could not success to check Mirek's method is good for my phone... Last step was writing serial number IMEI no to dev block but i could not do it...Because of my adb knowledge nothing. I did many things blindly ) let me do try and see the results...
Let's forget about past. Please advice me what should i do now to try to fix the phone.
Final status is ROM installed stock SEE ROM and my CSC now EUR but still imei null and unknown baseband... AP:N9005XXUFNG2 , CSC:N9005OXXFNG2
I am sure that the phone info shows original CSC EUR, this phone was XSI. During the custom rom installation CSC was changed. ( sweet rom can change CSC code, during aroma installation asking to select CSC ).
Any advice ?
Thanks and Regards.
Click to expand...
Click to collapse
Have you tried flashing a different modem?
Here is my previous post.
fredrik8 said:
I had unknown baseband and null imei yesterday on my N9005 after flashing stock rom using Odin. After 5 hours trying to find a solution I almost lost hope but then I tried flashing a other modem and it worked Phone works now and I have been using it all day.
The modem I flashed is CP_N9005XXUFNG2
I flashed it on N9005XXUEND5 (Nordic)
So my tip for you is to try find a different modem for your phone and flash it using Odin
Hope it helps
Click to expand...
Click to collapse

fredrik8 said:
Have you tried flashing a different modem?
Here is my previous post.
Click to expand...
Click to collapse
I have 6 different N9005 LTE modems 5 of them failed. now i am trying last one.
installing with odin two times with unthicked autobootloader as mentioned read one of the xda forum tread.
A question how can i know modem installed succsesfully because of unkown baseband phone info shows nothing !!!
is there another way to understand installed modem ?
i plan to install last E3 modem which was latest. i started from oldest to newest. on XXuFNG2 rom and csc EUR. if last one fail then i plan to follow mireks methods with adb commands. i was reading adb commands on android.com and viewed many videos on youtube about adb..
i am still working reading trying but still imei null and unknown baseband.

Same boat
I'm in the same boat as you guys!
No network, baseband, imei, nothing
I was on 4.3 MK2 XSI and flashed KK netherlands PHN stock ND3.
On first flashing, I got error "invalid ext4" on odin 3.09
Then I flashed the same ND3 with pit file and it passed.
Then this happened. no network, imei.
BTW I have EFS backup in .IMG backup which has that mc11.something file. But replacing that is of no use.
What do you guys suggest ? Can I flash NG2 stock on this XSI region stock ?
Will I require to use PIT file ?
Thanks

Galaxy S4 without network signal. Please help.

First, I have a Galaxy S4 i9505 (4G), the problem does not affect my device, but the device's my cousin who is a Samsung Galaxy S4 i9500 (3G).
He recently purchased the unit from another person, the unit worked well, but had a small defect in the charging connector ...
He asked me to sell one of my cases and battery why his battery was apparently bad, why was not possible give loads on the battery, I managed to solve this problem.
The problem came when he asked me to update the device to Android 4.4.2 KitKat by several improvements, I downloaded the latest firmware available at SamMobile site and after that did the flash using Odin.
Knox had in 0x1 (the unit had been modified) and I read on some forums that night, that when doing upgrade directly from 4.2.2 version, especially XXUBMGA the EFS partition changes shape, thus having little network problem and signal.
Link : http://www.grupoandroid.com/topic/83400-modem-mg9-y-posteriores-modifican-la-efs/
My questions are, it is possible to resolve this situation? I read previously that the IMEI is restored from a backup made previously it is possible to recover the network signal, but made no backup of EFS ....
I also read a long time ago that it is impossible to downgrade to ROM's with lower versions if there Knox installed.
I did the update of Android 4.2.2 to 4.4.2 using Odin.
If possible downgrade, any of you can share the ROM XXUBMGA 4.2.2 for S4 i9500? Or tell me some possible solution installing another ROM / modem?
I am currently trying different modems and using the OmegaROM in my cousin's S4.
Thx

Extract the modem.bin file from the ROM download and flash that through Odin to correct this. Or simply flash the ROM itself again if you don't want to go through the hassle of getting just the modem file out of the download. Either option will restore the network.
The IMEI in this case likely has nothing to do with the problem you're having, unless the IMEI reports itself as null or starts with 049. If you want a proper backup of the IMEI, you want to download AntaresOne's backup tool from the I9505 Development subforum and follow his instructions to make the backup.

Null IMEI, Unknown Baseband

Hi,
Please don't be upset with me and Please bare my little experience, Thank you very much.
I noticed that such issue was discussed before in this section of the forum, The problem is too many referral threads I don't know which one to follow, I'm honesty lost! , Right now while I'm posting this issue there's six threads in front of me relevant with this but as I said don't know which one to follow and where to start from.
I was't satisfied with the performance of the new version of Android (Lollipop), so I decided to downgrade to JellyBean 4.4.2 , since then I had Null IMEI, Unknown Baseband & unstable system (restars and apps crahses).
The device is Galaxy Note 3 LTE Qualcomm version.
Again, Thank you in advance for your help.

You simply restore your backed up EFS folder .
Flash OB6 lolli[pop rom .
You need to read the faqs and guides before flashing its not risk free .

JJEgan said:
You simply restore your backed up EFS folder .
Flash OB6 lolli[pop rom .
You need to read the faqs and guides before flashing its not risk free .
Click to expand...
Click to collapse
All good problem is solved. Thank you very much you did help indeed.

Then you cannot restore it .
Try flashing the OB6 lollipop firmware if that fails its a paid for service centre repair .

It's possible to fix... but the main issue is, you can't go down from Lollipop to 4.4 without issues. Some say they can do it, but I think it depends a lot on what bootloader and kernel you're using.
You can try to fix it like this:
First - you have to go back to Lollipop and flash official samsung firmware for your device and country/region.
If you go back to stock, hopefully everything is restored. Latest firmware for your country might be different. Mine is OC3 (similar to OB6 but not the same)... but you can try OB6 first to see if it worked.
**Just remember, it has to be the same region as yours was before.
Here is link where you should download from. If you register there, the download speed will be faster than 15kb/s ... it will be more like 100-300 (either way, just wait for it to download).
hxxp: etc sammobile.com and go to firmware page and select your model and country

cyberboob said:
It's possible to fix... but the main issue is, you can't go down from Lollipop to 4.4 without issues. Some say they can do it, but I think it depends a lot on what bootloader and kernel you're using.
You can try to fix it like this:
First - you have to go back to Lollipop and flash official samsung firmware for your device and country/region.
If you go back to stock, hopefully everything is restored. Latest firmware for your country might be different. Mine is OC3 (similar to OB6 but not the same)... but you can try OB6 first to see if it worked.
**Just remember, it has to be the same region as yours was before.
Here is link where you should download from. If you register there, the download speed will be faster than 15kb/s ... it will be more like 100-300 (either way, just wait for it to download).
hxxp: etc sammobile.com and go to firmware page and select your model and country
Click to expand...
Click to collapse
Thank you very much.
I live in Australia and my carrier is Optus, however official Lollipop stock firmware for Australia hasn't come yet. I have used UK - O2 stock firmware which came out recently, everything is okay: Baseband, IMEI etc.. all came back and available now but phone signal still weak (two bars or no signal blank triangle most of the time). I will wait for that one and when available I will flash it and see.. if signal is still not good then I'll proceed to buy signal antenna replacement from Ebay.
Thanks again.

Its probably the UK modem is your problem .

What JJEgan said... maybe you can try UK (H3G) stock... as modem previous matches your Australian NG1 then goes to OB1 (instead of OC1). Either way, it can't be worse to try... just make a backup of current installation so you can revert back if H3G isn't better.
(otherwise, just have to wait for Oz to get their version). Good luck!

cyberboob said:
What JJEgan said... maybe you can try UK (H3G) stock... as modem previous matches your Australian NG1 then goes to OB1 (instead of OC1). Either way, it can't be worse to try... just make a backup of current installation so you can revert back if H3G isn't better.
(otherwise, just have to wait for Oz to get their version). Good luck!
Click to expand...
Click to collapse
Thanks to all of you guys, you're really helpful. I appreceate that

JJEgan said:
You simply restore your backed up EFS folder .
Flash OB6 lolli[pop rom .
You need to read the faqs and guides before flashing its not risk free .
Click to expand...
Click to collapse
Can you give me the link for the said ROM?

asianman said:
Can you give me the link for the said ROM?
Click to expand...
Click to collapse
sammobile . com as always.

Quick question about Modem & Bootloader

Yahia Angelo posted in the Note 3 exynos group "latest modem and bootloader"
Can someone explain to me what those are and how to use/install them.
Thanks. ^•^

Modem = baseband or radio >>> Network part of the OS .
Can be individual to countries or networks .
Bootloader >> Loads the OS .
They are already included in a phones firmware .
See baseband/ Modem threads in GENERAL section .

JJEgan said:
Modem = baseband or radio >>> Network part of the OS .
Can be individual to countries or networks .
Bootloader >> Loads the OS .
They are already included in a phones firmware .
See baseband/ Modem threads in GENERAL section .
Click to expand...
Click to collapse
So if I installed a N900XXUEBPG4_modem.tar.md5 on my note 3 n900 would that do anything bad to my phone. I live in New Zealand by the way.

Flashing a stock ROM should not do anything bad to the phone as long as the ROM you are flashing was written specifically for your phone. Flashing a stock ROM may require a factory reset before booting for the first time which means wiping all installed apps and data.
There is always risk involved when flashing a phone's firmware.