Develop Bugs

[Q] [HELP] change baseband

is there a way now for lg optimus g to change baseband?
I bought LG optimus G F180K (KT version -olleh), I'm from Philippines btw. I can't get 3G even with the original device setting. I flashed E975-10a firmware which I downloaded from the LG site for firmwares. I'm sorry I'm noob about this. I flashed the KDZ file without unlocking the bootloader, is that ok? Anyway, everything went well, but still I only get 2G signal. I think I need to change the baseband in order to get 3g or 4g. HOW DO I DO THIS?
Thanks!
Edit:
BTW my current baseband is APQ8064/MDM9x15M
kernel: 3.4.0
build #: JZO54K
I read somewhere in the forum that after he flashed the E975 firmware on his F180L device, he then flash the orginal baseband for F180L. Can someone provide a flashable baseband for F180K? I would greatly appreciate it.

I got this from another thread
hiepgia said:
Sure, you must do this.
First: Root, Enable USB Debugging, Download this file: (I can't post the link since I have less than 10 post as of now)
2. Copy this baseband.img to Internal Storage (/sdcard)
3. Run file flash_baseband.bat
4. Follow the guild.
5. Your phone will reboot and finish! :victory:
Click to expand...
Click to collapse
Here they simply flash the baseband. Is there someone out there who would generously share the how to flash the baseband for F180K?

i own an lg optimus G e970 at & t version on ics
i rooted it.... installed slick JB on it http://forum.xda-developers.com/show....php?t=2084431
but forgot to install the modem via recovery.... so when i turned my fone ON, i had carrier network signals available but wifi was not working....
i downloaded a KOREAN kdz for f180L and tried flashing it on my e970 via R n D tool...it was successfull but when my fone rebooted, it was country locked (required some password at the beggining)
so then i started looking for the other kdz,s available online (as i was specifically looking for kdz for at & t LGOG)
then i found a brazilian kdz for e977 and flashed it to my fone via R n D tool and my fone booted up.....everything working but no network signal showing a sim error icon in status bar
edit 1: finally i got the LGNPST to work and flashed the stock at & t rom but still it shows "no sim card"
flashed a different jb radio...its getting weak signals
working on it now
may be need efs

michaelgeorge said:
is there a way now for lg optimus g to change baseband?
I bought LG optimus G F180K (KT version -olleh), I'm from Philippines btw. I can't get 3G even with the original device setting. I flashed E975-10a firmware which I downloaded from the LG site for firmwares. I'm sorry I'm noob about this. I flashed the KDZ file without unlocking the bootloader, is that ok? Anyway, everything went well, but still I only get 2G signal. I think I need to change the baseband in order to get 3g or 4g. HOW DO I DO THIS?
Thanks!
Edit:
BTW my current baseband is APQ8064/MDM9x15M
kernel: 3.4.0
build #: JZO54K
I read somewhere in the forum that after he flashed the E975 firmware on his F180L device, he then flash the orginal baseband for F180L. Can someone provide a flashable baseband for F180K? I would greatly appreciate it.
Click to expand...
Click to collapse
checkout this : number 70 post
http://forum.xda-developers.com/showthread.php?t=2160611&page=7

3G problem on F180L

Hello guys,
i ve changed today provider and 3G is not working.When i open data,it is always under GPRS.Can anyone think hw can i solve this?Also the provider is vodafone.If i download the Greek KDZ (wich is for the phone been sold by vodafone) will change something?is there any posibility to work without changing baseband?cause i think that if i change rom and then baseband same error will occur.

MafiaGR said:
Hello guys,
i ve changed today provider and 3G is not working.When i open data,it is always under GPRS.Can anyone think hw can i solve this?Also the provider is vodafone.If i download the KDZ (wich is for the phone been sold by vodafone) will change something?is there any posibility to work without changing baseband?cause i think that if i change rom and then baseband same error will occur.
Click to expand...
Click to collapse
may be the access point is wrong,may be you can press "*#*#4636#*#*"to select a proper network mode,and i believe if you flash kdz will give you 3g back,but it is the last way.

nature2494 said:
may be the access point is wrong,may be you can press "*#*#4636#*#*"to select a proper network mode,and i believe if you flash kdz will give you 3g back,but it is the last way.
Click to expand...
Click to collapse
Thanks for your response!
Pressing *#*#4636#*#* didnt help.it did nothing,i couldnt choose something.ill try to back up my phone and then do a factory reset,cause lte doesnt work too.Btw 3g worked yesterday randomly some time..Dont know what the hell is going on!

MafiaGR said:
Hello guys,
i ve changed today provider and 3G is not working.When i open data,it is always under GPRS.Can anyone think hw can i solve this?Also the provider is vodafone.If i download the Greek KDZ (wich is for the phone been sold by vodafone) will change something?is there any posibility to work without changing baseband?cause i think that if i change rom and then baseband same error will occur.
Click to expand...
Click to collapse
May be incompatible frequencies?
F180L is version for LG Telecom which doesnt use WCDMA network.
F180L does supports WCDMA, but as i remember it has some odd frequencies.
And check the APN

Tim4 said:
May be incompatible frequencies?
F180L is version for LG Telecom which doesnt use WCDMA network.
F180L does supports WCDMA, but as i remember it has some odd frequencies
Click to expand...
Click to collapse
well with my former provider it worked fine.And its strange cause sometimes 3g works with this provider too!the bad thing is that i cant choose in this rom in what mode i want to connect.In open european mode it had some options,also in stock avatar rom.I think ill try a hard reset and if i dont have any changes ill try to use open european version.Btw does anybody know,if i change to european version,can i have OTA updates?Or ill have to dowload it everytime and install it through KDZ updater?
Btw its F180l U+ edition from Korea

MafiaGR said:
well with my former provider it worked fine.And its strange cause sometimes 3g works with this provider too!the bad thing is that i cant choose in this rom in what mode i want to connect.In open european mode it had some options,also in stock avatar rom.I think ill try a hard reset and if i dont have any changes ill try to use open european version.Btw does anybody know,if i change to european version,can i have OTA updates?Or ill have to dowload it everytime and install it through KDZ updater?
Btw its F180l U+ edition from Korea
Click to expand...
Click to collapse
anyone any solution?

I tried this but when I clicked on the "select radio band" option, it gave me an error notice "?unfortunately, the process com.android.phone has stopped". Plz how do I rectify? NB... My device has no connection to any of the carrier networks after upgrade.

F180k successfully converted to e975(rom) network problem

I CONVERTED FROM STOCK KOREAN ICS ROM TO PHILIPPONE E975 ROM.. PERFORMANCE WISE ITS GOOD, LESS THAN 1GB USAGE OF RAM. BUT OHAVE THIS NETWORK ISSUE AND I CANT CONNECT TO MOBILE NETWORK.. WIFI AND BT IS OKAY BUT MOBILE NETWORK NOT WORKING.. CAN ANYONE HERE PLEASE HELP ME? MYCARRIERS BAND ARE 2100 FOR 3G and GSM ALL BANDS
EDIT: NETWORK PROBLEM NOW FIXED!!! SEE PAGE 2 OF THIS THREAD

did u flash basedband of f180k after converting to international optimus g..

Q: I'll ignore your advice,I still want to convert to E975 my korean model. What are the risks?
A: The hardware specs are the same, the difference is made by 4G(LTE) modem. Asia is using different LTE bands than Europe. So,you have to flash korean modem from HERE .Thanks houstonn for his work.

http://downloads.codefi.re/houstonn/lgog/modem/korean/cwm-lgog_f180k_modem.zip
flash it in cwm and u are ready to go..

. I gave him the same answer.

sorry kimitza i didnt see ur post...

Thanks guys!! I flashed the zip korean modem through cwm! But be warned imei will be lost so backup your imei first just follow the thread here somewhere on how to backup efs partition. For me i used manual method thru terminal and uploaded my backup in my dropbox for future use . For all those who will convert korean to international backing up ur efs is most important!!!

If you'll post exactly how you did it, i'll add it to FAQ,so it will help others.

kimitza said:
If you'll post exactly how you did it, i'll add it to FAQ,so it will help others.
Click to expand...
Click to collapse
Hey yeah that's a good idea, ill post it here maybe and change my title of thread and we can share it to everyone thanks!

Just post it, i'll add to my Freagin annoying questions ..With proper credits to you, of course.

davevinci said:
i converted from stock korean ics rom to philippone e975 rom.. Performance wise its good, less than 1gb usage of ram. But ohave this network issue and i cant connect to mobile network.. Wifi and bt is okay but mobile network not working.. Can anyone here please help me? Mycarriers band are 2100 for 3g and gsm all bands
Click to expand...
Click to collapse
mobile network now working!!!

So ,you used freegee to restore the efs partition?didn't this relocked your bootloader? I wanna understand this cleary,so i can put it for everybody

HERE'S ALL OF IT FROM BACKING UP to NETWORK FIX(THIS IS FOR THE KOREAN 180K)
1) FIRST OF ALL CREATE BACKUP OF YOUR EFS PARTITION!!!
http://forum.xda-developers.com/showthread.php?t=2164749
WHAT I DID IS THE MANUAL METHOD in the Terminal and transferred the 3 .img files to a safe storage(m9kefs1.img,m9kefs2.img,m9kefs3.img)
DONT USE OPTIMUS G TWEAKER FOR EFS BACKUP BECAUSE IT WILL REPLACE THE MODEM U WILL BE FLASHING THAT'S WHAT I NOTICED!!! BETTER TO DO IT MANUALLY
2)KDZ firmware update thru kdz updater (i used e975 PHILIPPINES ROM)
-KDZ FILES GREATER THAN 1GB WONT WORK IT WILL GIVE U EXTRACTION ERROR USE LESS THAN 1GB
3)AFTER KDZ update RESET FACTORY THRU HOLD VOL DOWN + POWER TO REMOVE CACHE AND DATA FROM PREVIOUS ROM (IF UR PHONE WORKED FINE AFTER KDZing ignore this step but i got a sdcard 000000 error so i used this step)
4)ROOTED MY PHONE WITH THIS http://forum.xda-developers.com/showthread.php?t=2181103
5)FREEGEED TO UNLOCK BOOTLOADER AND INSTALLED CWM TOUCH
USED PLAYSTORE VERSION (need WI-FI for this one)
6)DOWNLOADED F180K MODEM HERE
http://downloads.codefi.re/houstonn/lgog/modem/korean
7)COPY MODEM ZIP IN SDCARD
8)RESTART IN RECOVERY HOLD VOLUME UP + POWER THEN VOL DOWN 2 times THEN POWER TO ENTER CWM RECOVERY
9)INSTALL ZIP FROM SD CARD THEN BROWSE TO THE MODEM ZIP AND FLASH WAIT TILL IT IS FINISHED
10)EXIT RECOVERY AND REBOOT!
AFTER REBOOTING YOU DIAL *#06# it will show IMEI null window and Network will not work because u need your IMEI!
DONT WORRY HERE IS WHERE YOUR EFS BACKUP FOR YOUR IMEI WILL COME IN HANDY!!
11)COPY THE 3 IMG FILE IN ROOT OF SDCARD AND INSTALL TERMINAL EMULATOR!
12)MANUALLY RESTORE THE IMG FILES USING THE TUTORIAL IN NUMBER 1! REBOOT! AND THERE U HAVE IT!!!
NETWORK FIX USING F180K MODEM WILL ONLY WORK IN COUNTRIES WITH THE SAME BASEBAND AS THE ORIGINAL F180K MODEM
GSM900, GSM1800, GSM1900, UMTS2100 (B1)
LTE1800 (B3)
FORTUNATELY HERE IN THE PHILIPPINES ALL BASEBAND ARE COMPATIBLE!

Will add it to FAQ.
PS, you can use kdz updater with bigger files. Just run kdz updater in compatibility mode xp sp3 with admin rights.

davevinci said:
HERE'S ALL OF IT FROM BACKING UP to NETWORK FIX(THIS IS FOR THE KOREAN 180K)
1) FIRST OF ALL CREATE BACKUP OF YOUR EFS PARTITION!!!
http://forum.xda-developers.com/showthread.php?t=2164749
WHAT I DID IS THE MANUAL METHOD in the Terminal and transferred the 3 .img files to a safe storage(m9kefs1.img,m9kefs2.img,m9kefs3.img)
DONT USE OPTIMUS G TWEAKER FOR EFS BACKUP BECAUSE IT WILL REPLACE THE MODEM U WILL BE FLASHING THAT'S WHAT I NOTICED!!! BETTER TO DO IT MANUALLY
2)KDZ firmware update thru kdz updater (i used e975 PHILIPPINES ROM)
-KDZ FILES GREATER THAN 1GB WONT WORK IT WILL GIVE U EXTRACTION ERROR USE LESS THAN 1GB
3)AFTER KDZ update RESET FACTORY THRU HOLD VOL DOWN + POWER TO REMOVE CACHE AND DATA FROM PREVIOUS ROM (IF UR PHONE WORKED FINE AFTER KDZing ignore this step but i got a sdcard 000000 error so i used this step)
4)ROOTED MY PHONE WITH THIS http://forum.xda-developers.com/showthread.php?t=2181103
5)FREEGEED TO UNLOCK BOOTLOADER AND INSTALLED CWM TOUCH
USED PLAYSTORE VERSION (need WI-FI for this one)
6)DOWNLOADED F180K MODEM HERE
http://downloads.codefi.re/houstonn/lgog/modem/korean
7)COPY MODEM ZIP IN SDCARD
8)RESTART IN RECOVERY HOLD VOLUME UP + POWER THEN VOL DOWN 2 times THEN POWER TO ENTER CWM RECOVERY
9)INSTALL ZIP FROM SD CARD THEN BROWSE TO THE MODEM ZIP AND FLASH WAIT TILL IT IS FINISHED
10)EXIT RECOVERY AND REBOOT!
AFTER REBOOTING YOU DIAL *#06# it will show IMEI null window and Network will not work because u need your IMEI!
DONT WORRY HERE IS WHERE YOUR EFS BACKUP FOR YOUR IMEI WILL COME IN HANDY!!
11)COPY THE 3 IMG FILE IN ROOT OF SDCARD AND INSTALL TERMINAL EMULATOR!
12)MANUALLY RESTORE THE IMG FILES USING THE TUTORIAL IN NUMBER 1! REBOOT! AND THERE U HAVE IT!!!
NETWORK FIX USING F180K MODEM WILL ONLY WORK IN COUNTRIES WITH THE SAME BASEBAND AS THE ORIGINAL F180K MODEM
GSM900, GSM1800, GSM1900, UMTS2100 (B1)
LTE1800 (B3)
FORTUNATELY HERE IN THE PHILIPPINES ALL BASEBAND ARE COMPATIBLE!
Click to expand...
Click to collapse
Nicely done brother. Can you now post SS of your phones baseband version? Like the ones you've posted above. Thanks.

I have posted a SS above showing my baseband.. I USED THE F180K MODEM and flashed it.. ALL NETWORKS HERE IN PINAS WORKING

davevinci said:
I have posted a SS above showing my baseband.. I USED THE F180K MODEM and flashed it.. ALL NETWORKS HERE IN PINAS WORKING
Click to expand...
Click to collapse
Hi bro. Can you share your EFS partitions? I want to test something in my LGOG. Thanks!

It won't help. Can't use efs from a phone to another.
Sent from LG E975 pwd by CM 10.2/smart phones,dumb people.

kimitza said:
It won't help. Can't use efs from a phone to another.
Sent from LG E975 pwd by CM 10.2/smart phones,dumb people.
Click to expand...
Click to collapse
Oh. Thanks for the info.

Heeelp!
Hi guys, I acquired a F180L, I converted to e975, flashed F180L antenna but i want to know if i can change basebands, because Claro Argentina's freqs are 850/1900, 1,2,5,6. Please i REALLY need 3G to work because I use it for work. I would apprecciate a lot your help. Thank you!

Invalid sim card error after flashing E975 kdz

I successfully (??) flashed my F180k to E975K kdz/
everything seems ok, but I get Invalid sim error, and obviously cannot connect/
I tried to unlock the phone using freegee, running TWRP, with no success. should i run CWM 6.0.3.0?
Any other ideas why the phone is locked or how to unlock it?
thanks,

invalid sim got nothing to do with lock bootloader and recovery and freegee

the phone is permanently locked (!!) help...
Any ideas how to bypass it?

if it was working fine before try the same stock f180 firmware and see if that works, have no idea about sim unlocking on optimus G. search for that.

gilsh4321 said:
Any ideas how to bypass it?
Click to expand...
Click to collapse
you need to flash f180 baseband, 1st check your f180 S or K or L then flash baseband made for your variant

thanks, I will try
sunyakram said:
you need to flash f180 baseband, 1st check your f180 S or K or L then flash baseband made for your variant
Click to expand...
Click to collapse
BTW, I was following your (great) instructions. probably did something wrong while trying to flash the baseband. I will retry.

gilsh4321 said:
BTW, I was following your (great) instructions. probably did something wrong while trying to flash the baseband. I will retry.
Click to expand...
Click to collapse
sorry if i was wrong,but many people including me use the method and have no worry,the problem only came when we make a lil mistake,what your model? f180s/f180l/f180k?

I was convertiong LG F180k to E975
sunyakram said:
sorry if i was wrong,but many people including me use the method and have no worry,the problem only came when we make a lil mistake,what your model? f180s/f180l/f180k?
Click to expand...
Click to collapse
your guide is really great, I probably did something wrong. how can I tell if I am running the right baseband?
the baseband currently installed on my phone is APQ8064/MDM9x15M.
do you have another baseban file other than what you've linked to on your guide?
many thanks!

gilsh4321 said:
your guide is really great, I probably did something wrong. how can I tell if I am running the right baseband?
the baseband currently installed on my phone is APQ8064/MDM9x15M.
do you have another baseban file other than what you've linked to on your guide?
many thanks!
Click to expand...
Click to collapse
i dsnt post any guide on here or any where,okay?
here are the links
f180s
f180k
f180l

I flashed the baseband, but it is still permanently locked.
Any ideas as to how can it be unlocked? maybe if I will use other EFS backup?
will it be solved if I will go back to to the original KDZ?

gilsh4321 said:
Any ideas as to how can it be unlocked? maybe if I will use other EFS backup?
will it be solved if I will go back to to the original KDZ?
Click to expand...
Click to collapse
have you backed up your efs before installing kdz? it may help you for working sim cards.
but if you revert back to orignal kdz baseband is a issue here again

Did u hard reset after flashing kdz???
Sent from my Optimus G using Tapatalk

I have the same problem
atifsh said:
if it was working fine before try the same stock f180 firmware and see if that works, have no idea about sim unlocking on optimus G. search for that.
Click to expand...
Click to collapse
I have the same problem and when I turn it back to stock F180K firmware it recognizes any sim very well
---------- Post added at 12:04 PM ---------- Previous post was at 11:57 AM ----------
sunyakram said:
you need to flash f180 baseband, 1st check your f180 S or K or L then flash baseband made for your variant
Click to expand...
Click to collapse
This did not solve the problem.
The baseband fix seems to only fix the reception issues of the phone so that it can pick up the signal.
The problem I have is about the phone not recognizing the sim card. It will only recognize it when I go back to the stock F180K rom not the E975 rom.
By the way, all F180 phones are pre-unlocked by Korean law.

jung901 said:
I have the same problem and when I turn it back to stock F180K firmware it recognizes any sim very well
---------- Post added at 12:04 PM ---------- Previous post was at 11:57 AM ----------
This did not solve the problem.
The baseband fix seems to only fix the reception issues of the phone so that it can pick up the signal.
The problem I have is about the phone not recognizing the sim card. It will only recognize it when I go back to the stock F180K rom not the E975 rom.
By the way, all F180 phones are pre-unlocked by Korean law.
Click to expand...
Click to collapse
can you please help me?
even if i go back to stock f180k, i still can't get a signal
is it my sim?
i already flash the baseband but still no use

call me
coldmalice said:
can you please help me?
even if i go back to stock f180k, i still can't get a signal
is it my sim?
i already flash the baseband but still no use
Click to expand...
Click to collapse
You do not need to touch the baseband if you already flashed the F180K rom.
The sim should be recognized and baseband should be the right one already.
If you need further info add jseo to kakao talk and send me a message and we can talk real time. I'm in Seoul

jung901 said:
You do not need to touch the baseband if you already flashed the F180K rom.
The sim should be recognized and baseband should be the right one already.
If you need further info add jseo to kakao talk and send me a message and we can talk real time. I'm in Seoul
Click to expand...
Click to collapse
Can you please tell me what to do?

Invalid sim card after converting E975
neaznc021 said:
Can you please tell me what to do?
Click to expand...
Click to collapse
Hi Guys,
I need expert help here , it looks i brick my handset while i was trying to convert it into E975 by following the instruction
Guide
Regardless of which firmware you are currently running on your F180, you will need to download and switch to the corresponding one from the list below:
F180S : F180S20B_00.kdz
F180K : F180K20B_00.kdz
F180L : F180L20H_00.kdz
Tip: You can find your phone’s model by going to ‘Settings > About > Phone identity’ in Android.
Warning: Make sure your phone’s battery is at least charged 80%. Don’t proceed otherwise as LG Optimus G comes with non-removable battery and thus you won’t be able to easily swap the battery if it dies in the middle of the process.
It is mandatory that you factory reset your phone before proceeding. For doing so, go to ‘Settings > Privacy > Factory data reset’. Please keep in mind that doing so will wipe your phone including contacts, messages, mails, applications and all the data on your phone’s internal storage. Your phone will reboot twice. Let it boot after factory reset. Once you are on the language selection screen, power off your phone
Press and hold down ‘Volume Up’ + ‘Volume Down’ and while inserting USB cable in to the phone. This will get you to S/W download mode on LG F180.
Now you need to flash the firmware you downloaded earlier. Please refer to the guide here:
How to: Download and Install KDZ LG firmware – All Android models
Once the KDZ firmware is successfully flashed, your phone will reboot automatically. Once it fully boots up, go through the setup procedure and again factory reset it as you already did once.
Once you are on the language selection screen, power off your phone
Once again, put your phone in download mode
For converting your phone to E975, we’ll be flashing this E975 Hong Kong KDZ:
Follow the same procedure for flashing KDZ as you did earlier.
Once the KDZ flash is successful, go through the set-up procedure. Now go to ‘Settings > Storage’ and make sure your internal storage is being listed there. If it shows “0.00 GB” there, don’t panic. Power off your phone. Once completely off, press and hold down ‘Volume Down’ + ‘Power’ buttons until the phone displays a hard reset screen. Release ‘Volume Down’ and press ‘Power’ twice for resetting your phone.
Your phone will reboot once again and your phone’s internal storage will be back to normal.
Now you need to root your phone. Please refer to our LG Optimus G universal rooting guide here:
Universal root for LG Optimus G – Any firmware
Once you are done with rooting process, make sure you reboot your phone at least once if it doesn’t reboot automatically.
Now we will be flashing LG F180 baseband. Download your corresponding baseband backup from the list below:
F180S Baseband
F180K Baseband
F180L Baseband
Unzip the downloaded archive and you will find a batch file named ‘modem-flash’ inside it. Make sure ‘USB Debugging’ is enabled on your phone and your phone is in ‘Charge only’ mode while connected to the PC. Run the ‘modem-flash’ batch file.
Keep an eye on your phone screen as you will need to tap the grant permission button on SuperSU pop-up. If you miss the pop-up as it expires after 10 sec, run ‘modem-flash’ batch file again.
Once the baseband has been flashed successfully, reboot your phone
Congratulations! You have just converted LG F180 to LG E975.
it converted successfully but when i insert sim in it says invalid sim card , i have updated the base band given in above link but no luck then i tried to flash the original rom with many version for this set same thing again ,no signal no network .i think i mess up with the orginal modem without taking any kind of backup.
I need expert advise here how to fix it and which kdz to use to fix it.
looking forward for your reply.
Thanks,

@ranadawood: Flash original kdz file for your respective model to get back network ...
e.g F180L/k or S one

umair928 said:
@ranadawood: Flash original kdz file for your respective model to get back network ...
e.g F180L/k or S one
Click to expand...
Click to collapse
I already tried but no luck i tried F180K20O but no luck ,trying F180K30b_00 giving me extract erro.
Please let me know which could be the original rom for my phone and?
Thanks

ranadawood said:
I already tried but no luck i tried F180K20O but no luck ,trying F180K30b_00 giving me extract erro.
Please let me know which could be the original rom for my phone and?
Thanks
Click to expand...
Click to collapse
Follow this guide, This has also many fix included...
http://forum.xda-developers.com/showthread.php?t=2625044
and if none of above work for you than try to flash kdz with cdma mode rather than 3gqt and start kdz flashing by selecting CSE web upgrade test

LG Optimus G Baseband and imei mysterious problem

Hi everybody i am new to xda
Last week i got Lg f180L AND I CONVERTED IT INTO lg E975 from a site cellrabta.com
when i converted it into e975 signals started droping and getting weak. i flashed a baseband got from same site i.e cellrabta and my signals became ok
then i tried to update my jellybean rom to KK through software update but that gave me an error "Your phone is not registered yet"
then i rooted my phone with method from cellrabta and installed cwm with freegee and flashed kitkat stock rom from xda
but my signal problem was back and i tried to flash baseband it made my imei to be unknown
as i got my sim out of Lg optimus g imei was back and as i inserted sim imei unknown and service disabled again
i flashed stock f180l rom from cell rabta and then converted it again to e975 but signal problem was there i tried again to flash baseband but same problem of imei
now i am using art mod rom from xda its better signals are better than before but not stable and drops but less than before
what should i do? i am really worried cause i got it a week before and my brother is gonna get mad on me for making problems in it
Kindly help!

solution
ramnoob said:
Hi everybody i am new to xda
Last week i got Lg f180L AND I CONVERTED IT INTO lg E975 from a site cellrabta.com
when i converted it into e975 signals started droping and getting weak. i flashed a baseband got from same site i.e cellrabta and my signals became ok
then i tried to update my jellybean rom to KK through software update but that gave me an error "Your phone is not registered yet"
then i rooted my phone with method from cellrabta and installed cwm with freegee and flashed kitkat stock rom from xda
but my signal problem was back and i tried to flash baseband it made my imei to be unknown
as i got my sim out of Lg optimus g imei was back and as i inserted sim imei unknown and service disabled again
i flashed stock f180l rom from cell rabta and then converted it again to e975 but signal problem was there i tried again to flash baseband but same problem of imei
now i am using art mod rom from xda its better signals are better than before but not stable and drops but less than before
what should i do? i am really worried cause i got it a week before and my brother is gonna get mad on me for making problems in it
Kindly help!
Click to expand...
Click to collapse
Flash f180L kdz, don't convert it into e975 and then flash artmod or sling :good:
your phone will have imei and signals

found another solution too! btw thanks
mohsinister said:
Flash f180L kdz, don't convert it into e975 and then flash artmod or sling :good:
your phone will have imei and signals
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Hey i searched internet and found a zip file name patch_bb_l that solved my problem when i lost my signals after converting to E975