Database Info

Running broken Gingerbread baseband, how to downgrade-upgrade to working?

Hey XDA modders,
Last year I upgraded with the leaked Gingerbread incl. baseband:
Android 2.3.5
L6260_MODEM_SIC_01.1042.00 baseband
GRJ90 build
2.6.35.7+ kernel
LG920-V21a-NOV-16-2011
Unfortunately it's been nothing but problems since then: missed SMS, ghost calls, etc. Unfortunately I'm now off the official LG path, so I can't get back. One of the difficulties in XDA is it's hard to keep up with what is going on. So I'm really not sure what to do as it seems people like me have 'missed the boat' so to speak to get this fixed, as it's hard to search and find any response about this.
My question is:
- What basebands have no known issues? eg. 21a, 21b, 20b?
- How do I downgrade/upgrade to the correct baseband? Flash KDZ?
Cheers
Leon

For what I know you have to downgrade to a 10x firmware ( with kdz or bin file ) only froyo rom seems to work properly

All Gingerbread Roms + CM Roms that used GB baseband suffer from this problem. The problem is in the new bb came with GB. So, the only solution for now is to go back to any froyo Rom.
However, the latest froyo Rom suffer from a problem, when you set wifi sleep policy to never, the phone will randomly reboot number of times a day. So, flash the one before the latest.
LG lost us all, no one is satisfaied!

you can follow this guide to upgrade/downgrade the stock rom, i used it to fix my bricked phone, it works on the downgrade too i downgraded from v21b to v21a

No netwrok or IMEI number on installing CM7

Ok, I know there are a lot of threads on these topic and believe me i have spent a lot of time reading multiple threads and the end result is i am not sure how to proceed , for my particular froyo version so I am posting it here hoping some Kind soul will help/suggest me on installing Cyanogen mod 7.
So here I go.
I have an LG P500 model phone with Anroid Froyo 2.2.1 (Software version V10c-DEC-08-2012, Build number FRG-83, KErnel 2.6.32.9 ). After trying several ways finally I have rooted my phone successfully. after making a clockwork recovery of my custom ROM, I proceeded to install CM7 Stable (for P500) using my 2GB memory card with 200 MB free space, it did not succeed and got stuck with the CM7 android logo.
I cleared up my memory upto 450MB and proceeded again by deleting cache/data and installing CM7 stable. This time it did install but i lost the IMEI number and the phone could not detect any network. I got the same result when i tried CM7 RC-3 . being unable to get a working phone I have reverted back to my custom rom using recovery.
After reading so many threads about these issues, i feel that this is some kind of basband problem as mine version is V10C, Can someone please help me how to install CM7 without loosing my IMEI and netwroks. (a step by step approach would me most appreciated). Thanks in advance.

Yes you need to upgrade your baseband to V20, there are several tutorials (step by step) on how to upgrade baseband on this forum.
Sent from my LG-P500

Thanks for the reply, but do i need to install the new baseband after flashing with CM7 or prior to installingCM7, Please clarify this. as I dont want to get stuck again.

cm7 roms are new bb. u need to upgrade to v20 b4 flashng cm7. u can do it using lg pc suite or kdz updater.

Solved
I followed
tried to install V20 using this http://forum.xda-developers.com/showthread.php?t=1217504 which i found from here
I followed the steps in the thread but nothing noticable changed after doing it.
Thinking it had worked somehow I Flashed it now with CM7 but sadly nothing changed and my phone still did not had any network or IMEI even now.
I followed this http://forum.cyanogenmod.com/topic/44849-My-experience-rooting-and-ROMing-the-p500-on-Android-2.2.2..... and flashed using oldBBfix_signed.zip and whoa I got my network working again in no time.
Thank you guys for your reply and special Thanks to the people who made the threads that i have added above. :good::laugh:

[Q] I stuck with stok OS optimus 3d

Hello,
can i install this rom on my optimus 3d
ICS 4.0.4 Custom Full 3D ROM
os 2.2.2
baseband l6260_modem_sic_01,1042
kernel 2,6,35,7
broj vrzije frg83g
ver softvera lg920-v10d-jul-08-2011
so far I've already installed the Acura Team 3D, LiquidBeats V3.0, KING_3D_ROM and on any i dont hawe network : (
I did successfully return to the old version
but my mob working bad , and I therefore like to change to ICS 4 rom
but I fear that it will again be without success, and I'll just lose time with no success
so I would like to say that if anyone can make this or any other rom instead factory rom
Not to forget that I bought phone in the operator store Telenor Serbia
p.s.
Sorry for bad English

Today I tried to install .. and installation and start at about 15% said that everything is ok successfully installed and reset the mob stuck on lg logo
what to do please help

Try this:
http://forum.xda-developers.com/showthread.php?t=1244490

not so in general .. I went through zipa on the SD card ..
I hold power and volume, and when I go to open the instal rom from sd

sombadi help plz

It's the same problem as mine . But me 27 % stuck in it .
I tried smart flsher and it worked . I do not how did it do it . but it worked . And now my phone ICS
Sent from my LG-SU760 using xda app-developers app

Zlocesti said:
Hello,
can i install this rom on my optimus 3d
ICS 4.0.4 Custom Full 3D ROM
os 2.2.2
baseband l6260_modem_sic_01,1042
kernel 2,6,35,7
broj vrzije frg83g
ver softvera lg920-v10d-jul-08-2011
so far I've already installed the Acura Team 3D, LiquidBeats V3.0, KING_3D_ROM and on any i dont hawe network : (
I did successfully return to the old version
but my mob working bad , and I therefore like to change to ICS 4 rom
but I fear that it will again be without success, and I'll just lose time with no success
so I would like to say that if anyone can make this or any other rom instead factory rom
Not to forget that I bought phone in the operator store Telenor Serbia
p.s.
Sorry for bad English
Click to expand...
Click to collapse
first of all you have to change the BASEBAND and the ROM.
FLASHING ZIP ROM with CWM will NOT change your ROM from version to version (2.2 ->2.3 -> 4.0) !!!!
Once you install OVER THE COMPUTER your ROM (in KDZ or FLS+BIN) then you can play with custom roms.
so if you did this before install Acura ICS rom then proibabvly you lost you IMEI.
this check when you write on your dial pad *#06#
if it is empty - you should restore it - check the developer section how to do that.

I'm just so lost imei. Then I did a restore and everything was like when I bought the mob. Then am via CWM intall king rom and everything worked but I not have network. so I did restore again and now my phone is terribly slow. I'd like to install ics rom .. so if you could explain to me in detail how to make a switch or a link where what to do. as the phone was bought in the mobail operator and is SIM lock

Zlocesti said:
I'm just so lost imei. Then I did a restore and everything was like when I bought the mob. Then am via CWM intall king rom and everything worked but I not have network. so I did restore again and now my phone is terribly slow. I'd like to install ics rom .. so if you could explain to me in detail how to make a switch or a link where what to do. as the phone was bought in the mobail operator and is SIM lock
Click to expand...
Click to collapse
If you want to install gingerbrad ROM's you must update your phone to gingerbread, you can do this with official LG program or with kdz installer http://forum.xda-developers.com/showthread.php?t=1287236 and then install rom.Or if you want to install xbsall ICS port go http://forum.xda-developers.com/showthread.php?t=1956347.

Gutted Mate!!
But you Cannot UPGRADE from GingerBread ( Thats what you Had on phone originally ) To ICS through your phone using Clockwork Mod
your phone will try, but you will just end up confusing it like you have done,
http://forum.xda-developers.com/showthread.php?t=1956347
follow this thread and read every post from Page 1, then read all post in links to other helpfull threads like this one
http://forum.xda-developers.com/showthread.php?t=1244490
i found this helped
http://forum.xda-developers.com/showthread.php?t=1942836
but tbh i cant really stress enough,, that you need to read read read lol,, and if still not sure read some more :good:
Good Luck buddy

[Q] Lost 3G since rooting

Hi all
I've rooted my lg p500 using super one click, and install recovery 1.2.
Then i've flushed a couple of ICS roms, and in all, i don't have any 3g connection. When i try to "scan for networks" i get a toast saying error while scanning.
What can i do?..
should i flash a radio or something?

If you were on Froyo when you rooted, you were on the old Baseband.
The ICS ROMS work on the New Baseband.
Hence you will need to upgrade the baseband - easiest way will be to search & apply the "Old BB Fix".

old Bb fix don't work for ics and jb rom
try gingerbread rom or flash a new baseband

pmvyas said:
If you were on Froyo when you rooted, you were on the old Baseband.
The ICS ROMS work on the New Baseband.
Hence you will need to upgrade the baseband - easiest way will be to search & apply the "Old BB Fix".
Click to expand...
Click to collapse
Thanks.
I did try to flash old bb fix - didn't work, as androidisfuture suggested.
androidisfuture - can u point me to howto for the new bb?

Works on ICS Hephappy's ROM.
Also, ICY Snap by Neko ( again based on Hep's ICS ) has builtin Old BB Fix which you can activate through the Terminal Emulator.
http://forum.xda-developers.com/showthread.php?t=1529777&page=516
Check post #5157 & the 1st post
Other than flashing the baseband fix, the baseband can be changed to new by upgrading to GB using LG Update.
There are other methods like LGMDP - http://forum.xda-developers.com/showpost.php?p=15250036&postcount=1 or http://forum.xda-developers.com/showthread.php?t=1217504 are two threads which will help you upgrade to new baseband using LGMDP

pmvyas said:
Works on ICS Hephappy's ROM.
Also, ICY Snap by Neko ( again based on Hep's ICS ) has builtin Old BB Fix which you can activate through the Terminal Emulator.
http://forum.xda-developers.com/showthread.php?t=1529777&page=516
Check post #5157 & the 1st post
Other than flashing the baseband fix, the baseband can be changed to new by upgrading to GB using LG Update.
There are other methods like LGMDP - http://forum.xda-developers.com/showpost.php?p=15250036&postcount=1 or http://forum.xda-developers.com/showthread.php?t=1217504 are two threads which will help you upgrade to new baseband using LGMDP
Click to expand...
Click to collapse
i got there, but when running LGMDP i don't see my device when pressing "select port".
i've installed LG usb drivers, am i supposed to install the "SUPPORT TOOL" too? i've tried but it is simply stuck while installing... as i read around here this is an unknown network problem.

Did you disable lg modem first?
( in right click mycomputer->manage->device manager->modems->right click on lg modem disable it)
Check your PM
But before doing this, do keep a nandroid backup of your current system through the recovery, just in case you need to revert.

Thanks pmvyas,
I've already check the "lg modem" thing - i dont have lg modem in my device manager (i also don't see "modems", i have "network adapters").
Does this means something is not installed?

reformy said:
Thanks pmvyas,
I've already check the "lg modem" thing - i dont have lg modem in my device manager (i also don't see "modems", i have "net,work adapters").
Does this means something is not installed?
Click to expand...
Click to collapse
lg united mobile drivers are installed or not check

reformy said:
Thanks pmvyas,
I've already check the "lg modem" thing - i dont have lg modem in my device manager (i also don't see "modems", i have "network adapters").
Does this means something is not installed?
Click to expand...
Click to collapse
Means the LG mobile drivers are not properly installed in your PC.
Uninstall & re-install http://www.mediafire.com/?d3i35a73a344qk4

Finally managed to solve the problem.
I didn't see the modem on my PC because the phone was running ICS rom - no signal, no USB recognitaion (can't use SD card either).
I've flashed a 2.2 rom, and then i could see it in the device manager as modem. From here all worked as the tutorials said.
Thanks pmvyas!

androidisfuture said:
old Bb fix don't work for ics and jb rom
try gingerbread rom or flash a new baseband
Click to expand...
Click to collapse
To everyone.. BB fixes work with all android versions.
- CWM (old baseband) recovery is recommended.. latest Amonra or others dont support bbfix patches.
( If you are on Old Baseband.. you should use old bb recoveries.)
- Both BBfixes are in my signature.

reformy said:
Finally managed to solve the problem.
I didn't see the modem on my PC because the phone was running ICS rom - no signal, no USB recognitaion (can't use SD card either).
I've flashed a 2.2 rom, and then i could see it in the device manager as modem. From here all worked as the tutorials said.
Thanks pmvyas!
Click to expand...
Click to collapse
Glad to know I could help.
Now that you are on New baseband, you can try out the ICS's & JB's as per your choice, with network & data

Updating my p509 from 2012/2013

I purchased an Optimus T (P509) in 2012 and had it unlocked to use on a trip I went to europe. I played around with it a lot and messed with custom roms and basebands, and then left it alone for about a year. I'm now downsizing my phone/tech collection in general and looking to update this to use as a daily driver.
Here's the info about my phone:
ClockworkMod recover v5.0.2.0
Baseband: LGP509AT-00-V10l-OPEN-COM-OCT-23-2010
CyanogenMod version: 10-20130108-UNOFFICIAL-p509
Build number: cm_p509-userdebug 4.1.2 JZO54k eng.arjen.20130108.030427 test-keys
My questions are:
What updates to baseband (if any) do I need to do? Would this mess up my unlock?
Do I need to flash a new recovery?
What ROM would be best for my needs as a daily driver? requirements are stable without crashes and everything works, followed by the newest android version.
Really the rom part I can experiment with later, I'm just not sure if I've hosed myself with the baseband 'fixes' that I recall messing with 2 years ago. I have a new sim card on the way that I will use with this.

shivanani said:
I purchased an Optimus T (P509) in 2012 and had it unlocked to use on a trip I went to europe. I played around with it a lot and messed with custom roms and basebands, and then left it alone for about a year. I'm now downsizing my phone/tech collection in general and looking to update this to use as a daily driver.
Here's the info about my phone:
ClockworkMod recover v5.0.2.0
Baseband: LGP509AT-00-V10l-OPEN-COM-OCT-23-2010
CyanogenMod version: 10-20130108-UNOFFICIAL-p509
Build number: cm_p509-userdebug 4.1.2 JZO54k eng.arjen.20130108.030427 test-keys
My questions are:
What updates to baseband (if any) do I need to do? Would this mess up my unlock?
Do I need to flash a new recovery?
What ROM would be best for my needs as a daily driver? requirements are stable without crashes and everything works, followed by the newest android version.
Really the rom part I can experiment with later, I'm just not sure if I've hosed myself with the baseband 'fixes' that I recall messing with 2 years ago. I have a new sim card on the way that I will use with this.
Click to expand...
Click to collapse
1 - Actually upgrading baseband on that device would lock you out of some frequencies the radio ( not the FM radio ) uses to communicate with the carriers towers. I also have a Optimus T ( P509 ), tho no longer in service.
2 - Depends if you want KitKat ( 4.4 ). If you do then you'll need CWM 6.0.4.4 or newer. I am currently working on a utility for older CWM versions to be able to install KitKat but until then you'll need what I just mentioned. If not too interested in KitKat then you can leave your recovery as is. I use CWM 5.0.2.7 Touch by @vivekkalady. I've been using her recovery since she introduced it.
3 - You'll have to search and make that decision for yourself as we all have different needs and habits.

shinobisoft said:
1 - Actually upgrading baseband on that device would lock you out of some frequencies the radio ( not the FM radio ) uses to communicate with the carriers towers. I also have a Optimus T ( P509 ), tho no longer in service.
2 - Depends if you want KitKat ( 4.4 ). If you do then you'll need CWM 6.0.4.4 or newer. I am currently working on a utility for older CWM versions to be able to install KitKat but until then you'll need what I just mentioned. If not too interested in KitKat then you can leave your recovery as is. I use CWM 5.0.2.7 Touch by @vivekkalady. I've been using her recovery since she introduced it.
3 - You'll have to search and make that decision for yourself as we all have different needs and habits.
Click to expand...
Click to collapse
That's interesting what you said about the current baseband, I'm not sure if I changed it after I last used it. But I turned off airplane mode and popped in a T-mob sim and it wasn't able to connect to a network, similar results with H2O wireless card (at&t mvno). I'm not sure if my current version of android is messed up or the baseband.
I don't mind upgrading CWM, is there any downside to doing so? Is there a kitkat build out now that works? I may want to use KitKat as I hear it's meant to be more usable on smaller memory systems like the p509.
I don't mind finding one I like eventually, but looking for a recommendation to start off with that should work without too much difficulty.
Thanks for you help so far, I hope if can figure out this cell network problem :-/

shivanani said:
That's interesting what you said about the current baseband, I'm not sure if I changed it after I last used it. But I turned off airplane mode and popped in a T-mob sim and it wasn't able to connect to a network, similar results with H2O wireless card (at&t mvno). I'm not sure if my current version of android is messed up or the baseband.
I don't mind upgrading CWM, is there any downside to doing so? Is there a kitkat build out now that works? I may want to use KitKat as I hear it's meant to be more usable on smaller memory systems like the p509.
I don't mind finding one I like eventually, but looking for a recommendation to start off with that should work without too much difficulty.
Thanks for you help so far, I hope if can figure out this cell network problem :-/
Click to expand...
Click to collapse
Either your APN settings are wrong, which you can manually fix, or you did upgrade/downgrade/change baseband. The P509 is supposed to be an old baseband phone. The P500 and P509 are identical. Only difference is the P500 is a new baseband device. You can flash a P500 ROM. If you don't get any signal, then most likely your on old baseband. There is a patch for that, no biggie. If you do get signal then you're on new baseband and you should continue to use P500 ROMs. If you decide to flash a P509 ROM you won't have any service which will be a baseband issue. There is a new baseband patch around here somewhere too.
You can find a link to the old baseband patch in the LG Optimus One FAQ. Post #8 or #9, I think.

shinobisoft said:
Either your APN settings are wrong, which you can manually fix, or you did upgrade/downgrade/change baseband. The P509 is supposed to be an old baseband phone. The P500 and P509 are identical. Only difference is the P500 is a new baseband device. You can flash a P500 ROM. If you don't get any signal, then most likely your on old baseband. There is a patch for that, no biggie. If you do get signal then you're on new baseband and you should continue to use P500 ROMs. If you decide to flash a P509 ROM you won't have any service which will be a baseband issue. There is a new baseband patch around here somewhere too.
You can find a link to the old baseband patch in the LG Optimus One FAQ. Post #8 or #9, I think.
Click to expand...
Click to collapse
I wasn't certain what my starting point was since I'd done this so long ago (and I thought I applied the old BB fix at some point too...). Anyways, I took a drastic step and installed the stock rom V10s_00.kdz with the kdz installer from LG. It successfully flashed and I don't have a brick on my hands
The problem is now the phone doesn't recognize any sim cards, of which I've tried 3: tmobile micro, h2o micro, and a gophone minisim. The microsims were put in a cut out minisim as an adapter. The gophone is a normal minisim that is uncut, but it's not activated. I never got a locked or bad sim message, just that there is no sim card in place.
Under phone status it shows a signal strength (varies -65 to -75 and 25 asu)
Under APN settings it matches the T-mobile ones
And the baseband via secret menu is amss6038
I'm wondering if the sim module or gsm module are messed up? I kinda want to try out the emergency calling but would rather not get the police involved

I messed up my SIM contacts when I left an adapter in there and pulled it a little too hard out! I removed the compression plate on the back and it works again. I'll have to get a small piece of electronic safe foam to apply pressure to the back of the SIM to keep it in proper position. (http://forum.xda-developers.com/showthread.php?t=2598308)
I'm interested in the kitkat build here: http://forum.xda-developers.com/showthread.php?t=2589303
If I were to want to use that, do I need to flash the baseband fix on top of the other install instructions? Anything special in terms of timing it at a certain point in the install process?
Thanks for your help so far, I forgot how much fun messing with android was :laugh:

shivanani said:
I messed up my SIM contacts when I left an adapter in there and pulled it a little too hard out! I removed the compression plate on the back and it works again. I'll have to get a small piece of electronic safe foam to apply pressure to the back of the SIM to keep it in proper position. (http://forum.xda-developers.com/showthread.php?t=2598308)
I'm interested in the kitkat build here: http://forum.xda-developers.com/showthread.php?t=2589303
If I were to want to use that, do I need to flash the baseband fix on top of the other install instructions? Anything special in terms of timing it at a certain point in the install process?
Thanks for your help so far, I forgot how much fun messing with android was :laugh:
Click to expand...
Click to collapse
Well, we still aren't sure if your device is new or old baseband. With the recovery you already have, flash CM10.1, CM10.2, or CM10.3 ( All JellyBean ). Latest CM10.2 builds can be downloaded here. Easiest way to work around the baseband thing is to figure out which ROMs, P500 or P509, that will give you cell service. Flash a P509 ROM. If no service then you upgraded baseband so you'll need to use P500 ROMs. Flash a P500 ROM and if no service then you're on old baseband and you should use P509 ROMs. Only difference between P500 and P509 ROMs is the P500 ROMs are NEW baseband and the P509 ROMs are OLD baseband.
As of now the only KitKat ROMs being build are for the P500. If you find you are OLD baseband, flash the oldbb fix from the FAQ I mentioned a couple posts back. Oh, and you'll need the newest CWM 6.0.4.4 or newer recovery to flash KitKat.
Hope all this helps...

shinobisoft said:
Well, we still aren't sure if your device is new or old baseband. With the recovery you already have, flash CM10.1, CM10.2, or CM10.3 ( All JellyBean ). Latest CM10.2 builds can be downloaded here. Easiest way to work around the baseband thing is to figure out which ROMs, P500 or P509, that will give you cell service. Flash a P509 ROM. If no service then you upgraded baseband so you'll need to use P500 ROMs. Flash a P500 ROM and if no service then you're on old baseband and you should use P509 ROMs. Only difference between P500 and P509 ROMs is the P500 ROMs are NEW baseband and the P509 ROMs are OLD baseband.
As of now the only KitKat ROMs being build are for the P500. If you find you are OLD baseband, flash the oldbb fix from the FAQ I mentioned a couple posts back. Oh, and you'll need the newest CWM 6.0.4.4 or newer recovery to flash KitKat.
Hope all this helps...
Click to expand...
Click to collapse
Well, I'm on the old baseband, the reason I know is I used KDZ to nuke it back to p509 stock! The more I read about kdz after I did it the more scared I got, but I lucked out and everything is fine now
The sim unlock is preserved, and I successfully rooted it with gingersnap. I don't have any sort of recover on it yet, it looks like CWM 6.0.4.4 does not work with older roms, just Kitkat based ones. So I'll do some more homework and figure out if I want to jump right into KK or try JB first.
Thanks for all your help, you gave me a quick jumpstart and brought back a lot of knowledge that was tucked away in the back corner of my brain!

shinobisoft said:
Well, we still aren't sure if your device is new or old baseband. With the recovery you already have, flash CM10.1, CM10.2, or CM10.3 ( All JellyBean ). Latest CM10.2 builds can be downloaded here. Easiest way to work around the baseband thing is to figure out which ROMs, P500 or P509, that will give you cell service. Flash a P509 ROM. If no service then you upgraded baseband so you'll need to use P500 ROMs. Flash a P500 ROM and if no service then you're on old baseband and you should use P509 ROMs. Only difference between P500 and P509 ROMs is the P500 ROMs are NEW baseband and the P509 ROMs are OLD baseband.
As of now the only KitKat ROMs being build are for the P500. If you find you are OLD baseband, flash the oldbb fix from the FAQ I mentioned a couple posts back. Oh, and you'll need the newest CWM 6.0.4.4 or newer recovery to flash KitKat.
Hope all this helps...
Click to expand...
Click to collapse
CM10.3
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