Hi I found a similar article on androidforums.com so I thought id make one here as a lot of people still seem to not know how to flash basebands and go from there. Ill start from the beginning.
For those who don't understand what this is about.
Old Baseband = If you have the Stock Froyo (2.2) Android system on your phone then you have the OLD BASEBAND, and you do not need this unless you updated to past 2.2.2 then continue reading if you wish to root your phone the easy way.
New Baseband = If you updated to the Stock Gingerbread (2.3) Android System on your Optimus One, then you fit this category, Lg have implemented a new baseband in this update which makes any Roms based on the old baseband not function, as well as making it more difficult to root your phone
FLASHING OLD BASEBAND
If you're already on official Gingerbread version you will need to downgrade your version to Froyo 2.2.2 using KDZ Updater. This is because the new Gingerbread contains the new baseband, and the Froyo firmware is the old baseband.
To do this please go onto this link that contains kdz and the stock Froyo 2.2.2 Rom required to flash. The reason you need 2.2.2 is its the easiest and proven version to work with Gingerbreak to root your device.
http://forum.xda-developers.com/showpost.php?p=13396506&postcount=1
Notice: If by some ACCIDENTAL reason, your phone gets stuck in EMERGENCY MODE during flashing, follow the instructions on this link how to use KDZs functions to continue flashing the firmware you downloaded in Emergency mode.
http://forum.xda-developers.com/showthread.php?t=1275523
FLASHING NEW BASEBAND
The Kdz File for new baseband is below, use the same method as above only using the v20G .kdz file instead of the 2.2.2 v10E update.
This will update your phone to the official LG 2.3 firmware, in which the new baseband originated.
csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/ANEUBK/V20g_00/V20G_00.kdz
If then stuck on LG Logo OR boot animation, try pulling and putting in your battery, turning on your phone and holding down volume down and home key, this should reset your phone to factory and then you will be able to boot into the stock gingerbread.
ROOTING
The easiest way to get root privileges on Old Baseband (2.2.2) firmware device is by using Gingerbreak apk. Just download it, install it and run it.
forum.xda-developers.com/attachment.php?attachmentid=600902&d=1305802958
To get Root access on the New Baseband (2.3.3) use SuperOneClick
http://forum.xda-developers.com/showthread.php?t=803682
Or direct link to the latest version
forum.xda-developers.com/attachment.php?attachmentid=778098&d=1320906597
Make sure, after you download the program, you go into your cmd, then go into the ADB folder, drag the ABD exe file into command prompt, delete the .exe part and add devices, so it look like this
OR
Download the ADB.zip attachment on this post, EXTRACT it so cmdXP and cmd7 are located inside the ADB folder in the Superoneclick directory, and run either version, depending on your windows version (This links you directly into ADB app, instead of manually dragging ADB.exe int cmd, really its just for your convinience.)
Then all you have to do is type the following lines.
adb devices
press enter
adb shell
press enter
then type in the following directly after
echo 1 > /data/local/lge_adb.conf
press enter.
Then go into Superoneclick.exe, select auto method and run root, this should then eventually root your device.
***WARNING***
Some Antivirus softwares will detect Superoneclick as a Virus.
IT IS NOT A VIRUS, just the types of exploite code it uses makes some antivirus software think of it as malicious. Just disable your AV for 5 mins before you extract Superoneclick.
RECOVERY
There's two popular custom Recovery versions for O1 - AmonRa and ClockworkMod
The easiest way to flash ClockworkMod Recovery is by downloading ROM Manager app from the Market (free or donate version doesn't matter) and choose to flash the latest recovery version and choose the option to Reboot in Recovery mode.
For Other Recoveries including Amonra there are a few links, but here is the one that has flashable zips
http://forum.xda-developers.com/showthread.php?t=1523050
Just flash the zip files in Clockworkmod recovery menu, after you install that through Rom Manager if you wish to use a different recovery.
Now that you got the right baseband + your device is rooted and loaded with a custom recovery you may install any Rom you wish that is based on the correct baseband such as
Mik_os 6.5.8 Cyanogenmod port (OLD BASEBAND).
http://forum.xda-developers.com/showthread.php?t=946354
[UNOFFICIAL][DEV/GEEKS-ONLY] Cyanogenmod 9 (Android 4.0.3)[BETA][NEW BASEBAND]
http://forum.xda-developers.com/showthread.php?t=1558213
OFFICIAL CYANOGENMOD Rom [NEW BASEBAND]
http://get.cm/?device=p500
Oxygen ROM 2.3.2 (Android 2.3.7)[NEW BASEBAND]
http://forum.xda-developers.com/showthread.php?t=1325386
Next time, search better
Also posted in wrong thread, this is developmentthread...
Don't know how many guides still to come on downgrading baseband.....
People...do search before making a new guide......
MODERATOR...plz look into this thread...
Sent from my LG-P500 using xda premium
fundoozzz said:
Don't know how many guides still to come on downgrading baseband.....
People...do search before making a new guide......
MODERATOR...plz look into this thread...
Sent from my LG-P500 using xda premium
Click to expand...
Click to collapse
Guys i did a search and looked into the sticky how to, and the only thing about downgrading baseband is using LGMDP, and kdz is only "mentioned" as a tool for unbricking your phone and flashing old firmware, new users would not know to use kdz.
Also this is a universal guide to root ANY lg optimus one together with having the old baseband, without having to mess around with SDK or LGMDP.
All members have to do now is look at this thread and all their questions are answered hopefully...
DIfference betweem this and doks.
This uses Official Lg KDZ updater, which means much less likely to brick your phone and if it does, KDZ is what is used to unbrick it anyway,
This option is much simpler to use for anyone.
I hear a lot about the new baseband making ROMs incompatible, but is there any advantage to the new baseband?
its not that they are making roms incompatiable, its that they are not designed for those Roms,
So far there has been no reports of any advantage having a new baseband, Lg engineers obviously decided on it for some reason, but the old baseband is more than fine, and in fact i have read several reports that with the new baseband gsm reception got worse in areas that they used to have fine reception, but thats all speculation.
Your best bet is to try for yourself, but if you want to make use of Roms such as miks cyanogen mod or others you have to use the old baseband.
There are other Roms available on the new baseband, so its upto you.
I suggest what rom you would like to install on your phone first, then pick the baseband it requires, as its only a simple flashing of your firmware.
Also note Gingerbreak.apk doesnt root any stock firmware past the 2.2.2 update.
Personally i pick the functionality and advantage of having a custom rom such as cyanogenmod over an update to the baseband
Does this guide work for Optimus T (LG P509) ? I have got one recently and currently using stock 2.2 on it. I don't know the difference between LG p500 and LG P509. I'm coming from T-Mobile G1 on which I'm using CM 7.1. Thanks for guidance.
Sent from my Dream/Sapphire using xda premium
Hi,
Doing a little search i found this thread
http://forum.xda-developers.com/showthread.php?t=960278
looking at it, i assume you can use this guide for p509, but i can not be 100% sure, try finding the t-mobile 2.2 kdz file, but yes not 100% sure the main difference.
deniso177 said:
DIfference betweem this and doks.
This uses Official Lg KDZ updater, which means much less likely to brick your phone and if it does, KDZ is what is used to unbrick it anyway,
This option is much simpler to use for anyone.
Click to expand...
Click to collapse
KDZ can brick your phone permanently. Dont use KDZ unless there is no other option, and using KDZ just to flash baseband is just dumb since there are better and safer methods. KDZ wipes out everything, so there is a high chance to brick, and it can't be fixed other than by going to the service center. This thread by doktornoktor is safer.
http://forum.xda-developers.com/showthread.php?t=1149530
Thanks anyway for sharing.
Gremaldin said:
KDZ can brick your phone permanently. Dont use KDZ unless there is no other option, and using KDZ just to flash baseband is just dumb since there are better and safer methods. KDZ wipes out everything, so there is a high chance to brick, and it can't be fixed other than by going to the service center. This thread by doktornoktor is safer.
http://forum.xda-developers.com/showthread.php?t=1149530
Thanks anyway for sharing.
Click to expand...
Click to collapse
I think KDZ is quite a safe method, rather than the LGMDP incorrectly backing up your NV2 and losing IMEI etc
Gremaldin said:
KDZ can brick your phone permanently. Dont use KDZ unless there is no other option, and using KDZ just to flash baseband is just dumb since there are better and safer methods. KDZ wipes out everything, so there is a high chance to brick, and it can't be fixed other than by going to the service center. This thread by doktornoktor is safer.
http://forum.xda-developers.com/showthread.php?t=1149530
Thanks anyway for sharing.
Click to expand...
Click to collapse
As you already quoted it, i said that this method is different from Doks.
As for wiping all data completely, so its all brand new and neat, then try to fiddle around with internals and possibly have a bug result from it.
KDZ is what is used to UNBRICK your phone in the first place, so go do some research before posting unnecessary things.
Lastly how about you show some respect and keep your negative and rude comments to yourself, if you dont like this method dont do it, dont abuse people in the process.
terratrix said:
I think KDZ is quite a safe method, rather than the LGMDP incorrectly backing up your NV2 and losing IMEI etc
Click to expand...
Click to collapse
And yep exactly, i personally prefer completely reinstalling something to make it work properly, then doing things dodgy.
tried using gingerbreak to root my device but stuck in rooting and exploit ph0ne does not reboot..
Sent from my LG-P500 using xda premium
ichigo200 said:
tried using gingerbreak to root my device but stuck in rooting and exploit ph0ne does not reboot..
Sent from my LG-P500 using xda premium
Click to expand...
Click to collapse
it means your phone is past the firmware update that gingerbreak works on,
as it says in the first post, use kdz and the file in the link to flash your phone to that firmware, and then gingerbreak will work
You guys will only learn when you finally end up with a bricked phone. It has happened to several people, including me. I am not a noob, I have used KDZ before and I know very well how to use it. Most of the time, everything goes smoothly. But even if we follow all instructions to the letter, there is a chance of KDZ bricking our phone for good.
http://androidforums.com/lg-optimus...read-2-3-3-official-firmware.html#post3328455
A warning to anyone tempted to do this. Like the original poster, I also have an LG Optimus T. I am technically savvy (15 years IT experience) and I followed the directions to the letter, but the end result is a bricked, unrecoverable phone. Had I known the risks involved, I would have been perfectly content with Froyo and waited for the official upgrade to arrive.
Here is how mine failed: during the kdz update process, while the phone was on the "Emergency Mode" screen, the kdz updater program threw an exception and crashed. This caused the phone to be permanently locked in emergency mode. The buttons are unresponsive and the only way to turn it off is to remove the battery. With the battery in, it immediately goes to the emergency screen. No combination of button presses (eg, hard reset) does anything. The computer will still see the devices but only if I remove the battery and start the phone up by inserting the USB cable.
I have tried every method for recovery I could find including the following. In each case, I tried it with the modem device listed in device manager both disabled and enabled, as instructed in other recovery threads I found.
Flashing the original .kdz ROM in emergency and cs_emergency modes. When I did, it failed with an exception 4008.
Flashing the original .dz ROM with all of the tools I could find. LGMDP and LGDP2 could see the phone's COM port but beyond that, they could not communicate with the phone in any way. I couldn't even retrieve the IMEI number.
Updating the phone with the LG update software. It actually detects that the phone needs an update and starts to do one but it fails at the point where it tries to communicate with the phone.
Based on other posts I found for the same problem, I believe the phone is completely unrecoverable. I spent over six hours trying to solve the problem and I'm kicking myself for even trying this. I have put in a repair claim with LG and I'm waiting for instructions on how to proceed.
I would not recommend you try this unless you are not worried about destroying your phone. I imagine most installs go without a hitch but if the buggy kdz updater software crashes like it did for me, your phone will likely be bricked permanently.
Click to expand...
Click to collapse
http://androidforums.com/optimus-on...y-boots-stuck-emergency-mode.html#post3301128
In short, don't mess with KDZ unless you really have to.
Click to expand...
Click to collapse
IF you still think KDZ is safe, then go ahead, use it. I don't care if you end up with a bricked phone.
EDIT: The guys at the service center favour LGMPD over KDZ too
Gremaldin said:
You guys will only learn when you finally end up with a bricked phone. It has happened to several people, including me. I am not a noob, I have used KDZ before and I know very well how to use it. Most of the time, everything goes smoothly. But even if we follow all instructions to the letter, there is a chance of KDZ bricking our phone for good.
http://androidforums.com/lg-optimus...read-2-3-3-official-firmware.html#post3328455
http://androidforums.com/optimus-on...y-boots-stuck-emergency-mode.html#post3301128
IF you still think KDZ is safe, then go ahead, use it. I don't care if you end up with a bricked phone.
EDIT: The guys at the service center favour LGMPD over KDZ too
Click to expand...
Click to collapse
I have used KDZ more than 2 dozen times -.- Just used it again this morning. I never ended up with a bricked phone mind you. They favour LGMPD since it's more updated, while KDZ is a little old but still very good.
There is a fairly equal share of bricked phones using LGDMPD, eventhough they got it back by using other people's NV2, they need to hope they are lucky to escape the long arm of the law.
Gremaldin said:
You guys will only learn when you finally end up with a bricked phone. It has happened to several people, including me. I am not a noob, I have used KDZ before and I know very well how to use it. Most of the time, everything goes smoothly. But even if we follow all instructions to the letter, there is a chance of KDZ bricking our phone for good.
http://androidforums.com/lg-optimus...read-2-3-3-official-firmware.html#post3328455
http://androidforums.com/optimus-on...y-boots-stuck-emergency-mode.html#post3301128
IF you still think KDZ is safe, then go ahead, use it. I don't care if you end up with a bricked phone.
EDIT: The guys at the service center favour LGMPD over KDZ too
Click to expand...
Click to collapse
Mate your the one who clearly doesnt get it.
And i read your post on androidforums, you even managed to brick your phone installing custom recovery, clearly your phone software is buggy, not kdz, kdz is capable of recovering while in emergency mode as well, but of course there are freak accidents.
EVERYTHING has a WARNING.
Every single Rom, Kernel, Recovery also carry a chance of bricking your phone.
I have used Kdz dozens of times and never had a problem with it, in fact, its what solved my problems in the first place.
And exactly wat terra said, the way LGDMPD works can also cause bricked phoes or taking shortcuts to make things half work.
You have to know what your doing, and follow instructions TO THE WORD, and you should be fine, if your going to skim read then you brick your phone doing the simplest of tasks (such as repeatedly flashing zips without reloading recovery...)
I will always prefer kdz as thats what the firmware comes with originally + i prefer doing clean installs any day.
Please Help...
Guys please help me. everything was running fine until I decided to switch to stock 2.3.3. I was unaware with this baseband thing. I switched to stock 2.3.3. I did not like it, so decided to roll back to cm7, I did, and here i am with no signal in my phone... I did flash the old baseband, but am still stuck with no signal... am in real trouble, and now if I again switch to stock 2.3.3, then also I dont get a network coverage at all. Please help me buddies
---------- Post added at 04:39 PM ---------- Previous post was at 04:28 PM ----------
And yes one more thing, even if I flash back the old stock froyo, via kdz or lgmdp, I cant get the network coverage... the guy at LG service center says there's some problem with the board... but I dont think its the board problem, is there any way to diagnose this issue or am I *ucked?
shreyas.kukde said:
Guys please help me. everything was running fine until I decided to switch to stock 2.3.3. I was unaware with this baseband thing. I switched to stock 2.3.3. I did not like it, so decided to roll back to cm7, I did, and here i am with no signal in my phone... I did flash the old baseband, but am still stuck with no signal... am in real trouble, and now if I again switch to stock 2.3.3, then also I dont get a network coverage at all. Please help me buddies
---------- Post added at 04:39 PM ---------- Previous post was at 04:28 PM ----------
And yes one more thing, even if I flash back the old stock froyo, via kdz or lgmdp, I cant get the network coverage... the guy at LG service center says there's some problem with the board... but I dont think its the board problem, is there any way to diagnose this issue or am I *ucked?
Click to expand...
Click to collapse
Hey mate, well no gsm is normally caused by the wrong baseband, so flashing back to the old one should fix the problem, try to re-flash the stock froyo given in the link on first post and see if that works, and if still no coverage then its a hardware problem and Lg should replace it for you, just dont forget to flash back to stock again if you rooted it, then they should fix it within the warranty.
I would like to know what is the safest way to unroot because I want to root my phone but I want to have the best chances in case I need to send my phone to warranty.
Can you please show me the best way to do that?
(sorry if this question has been asked before but I needed to be completely sure)
Best regards.
if you flash your original rom via smartflash or kdz update it will be unrooted.
Trolling in the deep
I am no expert, but I think there is no "safest" way. I recommend you know how to unbrick your phone if something goes wrong. Once your phone is rooted and you have a harware failure, there will be no way to unroot it or to flash it, so LG will know it has been rooted. Now, if they will care that you rooted the phone but sent it in because their battery started leaking: I don't know.
If there is a hardware failure, they wont know, that you rooted it. Cause then you probably wont get further, as to the LG screen. They wont be able to boot any further, except he is unable to unbrick it... Otherwise, if you flash the stock ROM and do a factory reset, they will never know
Thank you all for the help you gave me.
You forgot to push the THANKS button for everyone who helped
It's just a little button for you, but motivation for all who help, to keep on helping
I did not notice it until now
I'm pretty new to this, and I didn't fully understand the whole rom, flash, kernel stuff but I did it anyway, seeing as I jailbroke my ipod when I knew next to nothing about that kinda stuff...
Well, I rebooted into recovery using rom manager, and it didn't reboot. It shut off, but didn't turn back on.. I tried to turn it back on myself and only the lg logo would appear..
So I googled what was happening to my phone. It's either in the 'boot loop' or bricked... i don't know the difference, or if there's even one but what the hell do I do to fix it? ..
I tried holding down the power, 3D and volume down button but the recovery menu doesn't come up... and I really don't wanna download any more programs to fix it :/
Im sorry but you must now have to download some programs to fix. You follow this guide http://forum.xda-developers.com/showthread.php?t=1491870
And Flash your firmware using the kdz files. If you have anymore problems feel free to ask.
Sent from my LG-P925 using xda app-developers app
This worked for me
Sorry about the phone. This worked easier for me:
http://forum.xda-developers.com/show....php?t=1448803
BUT I already had .bin and .fls files on my computer, not .kdz. I suppose either way is about the same. It does feel like you are groping in the dark for a while, then it all comes together. And when you are done learning all about it you can fix all your friends' Androids for a bunch of Starbucks coffee or whatever.
:cyclops:
Also, be careful with custom recovery (CWM/TWRP); just be sure it works with your particular phone first. That's what 'bricked' mine; I had custom recovery not really compatible with the setup I have going on my Thrill and got bootloop. I had to reflash the ROM image as in above link or the one in the other poster to get out of it.
whoops
sorry guys ive been busy with work lately ill have to give that first option a go seeing as i basically have nothing left of the old system
ill update after i try it.
That last post of mine is old. This is my LG Flash Tool guide:
http://forum.xda-developers.com/showthread.php?p=39269819
Drivers are tricky to set up the first time you try it, but Flash Tool is more reliable in my opinion.
BTW P920 and P925 are the same device. Thrill is just the US AT&T branded version (who I have never used; I unlocked mine with a Straight Talk SIM). I have a Thrill and some small numbering inside the battery cover says "P920."
update
ok i just now have the time to try to restore my phone.
id like to get it back to rooted stock ics as its sole purpose will be games/other non important junk and id like to still have the 3d.
the phone currently has no os and boot to twrp i also dont have any of my old recovery files so im essentially starting from scratch on my new laptop.
where do i go from here?
can i just download a zip or recovery and and use the restore/install feature on twrp?
Follow the guide to install rooted stock ICS by way of LG Flash Tool.
bricked lg thrill 4g
my phone is bricked the only thing it has is cwm recovery
i need to be able to get an os on it ..i dont can if it stock or rooted gb or ics i just need it done.and the above link's files no longer work... i need a no bs way to get this fixed ..any takers?
i have an lg thrill it was on stock att gb then i did the update through official lg tool the touch screen will not respond not even the bottom buttons so i flashed back to gb and it works again..so i tried roms and the ics or jb have no touch either just gb any ideas?
Probably a bad flash. LG Updater is a piece of 'work,' to be polite. Use LG Flash Tool for custom ROMs or to update to ICS.
http://forum.xda-developers.com/showthread.php?p=39269819
Correct driver setup as in step 1 there is most important for a good flash. Read all that extra carefully. It can be tricky doing it the first time.
I would stay away from Smartflash. Too many lost IMEI stories.
If you did not know, P925 and P920 are the same device. P925 is American AT&T branded. Check out the fine print on the inside of the battery cover...my Thrill says P920, not 925. Anyway, all the good stuff is over at the Optimus 3D forum.
Oh, and you lose 3D function with JB ROMs; devs have not, and may never, get that to work. So stick with ICS if you want your 3D.
drastic00 said:
Probably a bad flash. LG Updater is a piece of 'work,' to be polite. Use LG Flash Tool for custom ROMs or to update to ICS.
http://forum.xda-developers.com/showthread.php?p=39269819
Correct driver setup as in step 1 there is most important for a good flash. Read all that extra carefully. It can be tricky doing it the first time.
I would stay away from Smartflash. Too many lost IMEI stories.
If you did not know, P925 and P920 are the same device. P925 is American AT&T branded. Check out the fine print on the inside of the battery cover...my Thrill says P920, not 925. Anyway, all the good stuff is over at the Optimus 3D forum.
Oh, and you lose 3D function with JB ROMs; devs have not, and may never, get that to work. So stick with ICS if you want your 3D.
Click to expand...
Click to collapse
hey men, i tried your guide, and i still cant use the phone, i mean, the touch isn't working at all =/, other than that, really usefull guide
i hope you can help me.
best regards!
It is critical to uninstall all LG stuff from pc and reboot pc before attempting to install drivers for LG Flash Tool, to avoid software conflicts. I suspect something is wrong there.
ok, ill try again, if anything comes up, ill post here. thanks for the answer! :good:
---------- Post added at 05:33 PM ---------- Previous post was at 04:57 PM ----------
drastic00 said:
It is critical to uninstall all LG stuff from pc and reboot pc before attempting to install drivers for LG Flash Tool, to avoid software conflicts. I suspect something is wrong there.
Click to expand...
Click to collapse
btw, i've got a confusion. before i tried to install Official ICS from your guide, i installed other roms, like CM10, and another one, i don't remember the name, and both got the same problem, touch screen doesn't work. so i went back to stock GB and the touch screen worked with no problem.
got any ideas?
thanks for the help.:good:
Probably same thing, drivers are not quite right. The ones from the guide conflict with the ones used by official LG updater. If they are on your pc at the same time, or if the ones from the guide(s) are not installed correctly, or at all, bad flash will probably result. So all those little steps and details in the guide are critical for a good flash for anything above GB; likely in going back to GB, the official drivers were ok to have, so flash to GB went ok. So follow all details in the guide very carefully (especially part 1).