[Guide] Unbrick T-mobile LG Leon

[VR25]

DO IT AT YOUR OWN RISK


Files needed:

LG Drivers: https://mega.nz/#!oQV3yS6Y!D2JPtEMfHiAXB5E5jC2lfFH8ZIOVLNhEHju28JtYwfI

LG Flash Tool: https://mega.nz/#!BB8UgKCT!YAdGWfYGXGLiV5arZzeSGGivtLlW-BuiKlv_ci2Xp0Y

LG Firmware: http://www.lg-phones.org/how-to-download-all-lg-phone-firmware.html
Fast alternative (for model LG-H345 ONLY): http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=FW9AW29132Q1ABFE1681VUH/H34510e_00.kdz


Unbricking Procedure

Remove the battery and put it back in.

2. Hold the Volume Up button (ONLY) while connecting to USB Cable

3. The Volume up button needs to be held until it reaches download mode

4. Open the Flash Tool

5. Select Type: 3GQCT

6. PhoneMode: EMERGENCY

7. KDZ : locate your .KDZ firmware file

8. Click on Normal Flash

9. Click on Start

10. Click on Clear update registry

11. Country: different country

12. Language: English

13. Click okay and wait for the LG Mobile Support tool to recognize the device. It takes a minute or two but the tool will recognize it. The software starts the extraction and re-boots at %100. Don't click on anything, just wait for your device to reboot, then you can remove USB cable. Your device will boot normally, and the it is no longer stuck in a boot loop. Your userdata will not be deleted.

Credits: dj rios and AP2FTW from Androidforuns.com

 

[triclone]

Thanks for sharing. Testing tonight. I got the update to 5.1.1 from T-mobile and I did not know that if you try to root after the update, it will soft brick your phone and the user WILL NOT be able to do the factory restore with the power and volume down trick. The phone wont respond. My phone is pretty much dead. If this works, you will be my favorite superhero. Thanks!

---------- Post added at 10:49 PM ---------- Previous post was at 10:23 PM ----------

I came back to say thank you again, you just saved my phone. Even my settings came back. You are the only person I was able to to find that had the right fix without running me around. I was not able to place the phone in download mode, but still followed your steps. The LG support too stopped at 24% and told me to remove the cable and the battery and place the battery back in. I placed the battery back and pushed the up volume almost at the same time that I inserted the USB cable on the phone. The phone went into download mode which I was not able to do before. Then the software continued to install the stock ROM. At the end, my phone rebooted and all my settings and apps were back how I left them before bricking the phone. Thanks forever.

 

[majicgordon]

It's Alive Again!

Thank you so much man. My LG devices have a history of dying due to flashing roms/recoveries but this is the first time a root messed up my phone. You saved me.

DO NOT ROOT THE LG LEON LTE IF YOU INSTALLED THE 5.1.1 UPDATE FROM T-MOBILE

 

[tmobile-lte-hawaii]

help

my leon is stuck in boot loop how do fix in firmware update pls help i just get this phone and im a dumb ass

---------- Post added at 12:13 PM ---------- Previous post was at 11:54 AM ----------

Thanks for sharing. Testing tonight. I got the update to 5.1.1 from T-mobile and I did not know that if you try to root after the update, it will soft brick your phone and the user WILL NOT be able to do the factory restore with the power and volume down trick. The phone wont respond. My phone is pretty much dead. If this works, you will be my favorite superhero. Thanks!

---------- Post added at 10:49 PM ---------- Previous post was at 10:23 PM ----------

I came back to say thank you again, you just saved my phone. Even my settings came back. You are the only person I was able to to find that had the right fix without running me around. I was not able to place the phone in download mode, but still followed your steps. The LG support too stopped at 24% and told me to remove the cable and the battery and place the battery back in. I placed the battery back and pushed the up volume almost at the same time that I inserted the USB cable on the phone. The phone went into download mode which I was not able to do before. Then the software continued to install the stock ROM. At the end, my phone rebooted and all my settings and apps were back how I left them before bricking the phone. Thanks forever.

can you help me

 

[nexus14]

Thanks! I followed the directions exactly and it worked perfectly

T-mobile had pushed an update to 5.1.1 and I reluctantly accepted. Then I tried to root using "LG One Click Root" application from XDA. It says it went through the rooting process successfully but when the phone restarts, it gets stuck at the LG boot screen. This fixes it!

So just FYI -- DO NOT ATTEMPT TO ROOT T-MOBILE LG LEON 5.1.1! IT WILL BRICK YOUR DEVICE.

 

[johnvuong1999]

Will this work for LG G2 VS980? verizon

 

[lorddaniel2006]

I always get stuck

I have tried over and over and i always get stuck at 47% on the LG Mobile Support Tool and 49% on the phone. Help me please.

 

[VR25]

Thanks for sharing. Testing tonight. I got the update to 5.1.1 from T-mobile and I did not know that if you try to root after the update, it will soft brick your phone and the user WILL NOT be able to do the factory restore with the power and volume down trick. The phone wont respond. My phone is pretty much dead. If this works, you will be my favorite superhero. Thanks!

---------- Post added at 10:49 PM ---------- Previous post was at 10:23 PM ----------

I came back to say thank you again, you just saved my phone. Even my settings came back. You are the only person I was able to to find that had the right fix without running me around. I was not able to place the phone in download mode, but still followed your steps. The LG support too stopped at 24% and told me to remove the cable and the battery and place the battery back in. I placed the battery back and pushed the up volume almost at the same time that I inserted the USB cable on the phone. The phone went into download mode which I was not able to do before. Then the software continued to install the stock ROM. At the end, my phone rebooted and all my settings and apps were back how I left them before bricking the phone. Thanks forever.

Hi, sorry for the time. I have been super busy these days. Anyway, I am glad you succeeded in unbricking your device.

 

[VR25]

Thanks! I followed the directions exactly and it worked perfectly

T-mobile had pushed an update to 5.1.1 and I reluctantly accepted. Then I tried to root using "LG One Click Root" application from XDA. It says it went through the rooting process successfully but when the phone restarts, it gets stuck at the LG boot screen. This fixes it!

So just FYI -- DO NOT ATTEMPT TO ROOT T-MOBILE LG LEON 5.1.1! IT WILL BRICK YOUR DEVICE.

Hi, sorry for the time. I have been super busy these days. Anyway, I am glad you succeeded in unbricking your device.

 

[VR25]

Thank you so much man. My LG devices have a history of dying due to flashing roms/recoveries but this is the first time a root messed up my phone. You saved me.

DO NOT ROOT THE LG LEON LTE IF YOU INSTALLED THE 5.1.1 UPDATE FROM T-MOBILE

You're welcome!

 

[VR25]

I have tried over and over and i always get stuck at 47% on the LG Mobile Support Tool and 49% on the phone. Help me please.

Hi, sorry for the time. I have been super busy these days. Anyway, did you try this procedure yet? (I am just quoting someone else) "The LG support tool stopped at 24% and told me to remove the cable and the battery and place the battery back in. I placed the battery back and pushed the up volume almost at the same time that I inserted the USB cable on the phone. The phone went into download mode which I was not able to do before. Then the software continued to install the stock ROM."

 

[the wetzel~izer]

I Did The Same Thing!

Thanks! I followed the directions exactly and it worked perfectly

T-mobile had pushed an update to 5.1.1 and I reluctantly accepted. Then I tried to root using "LG One Click Root" application from XDA. It says it went through the rooting process successfully but when the phone restarts, it gets stuck at the LG boot screen. This fixes it!

So just FYI -- DO NOT ATTEMPT TO ROOT T-MOBILE LG LEON 5.1.1! IT WILL BRICK YOUR DEVICE.

I also used "LG One Click Root" but on a Metro PCS LG Leon LTE and it went through the process and rebooted but got stuck on the logo.

 

[workingm]

I'm having a situation where the downgrade succeeds, but the phone still stays at LG logo and keeps booting.
If I connect the LG mobile support tool application, it states the phone is on 34510d firmware (eg, it does not downgrade, but remains in boot loop).
What I did was upgrade manually to T-mobile 5.1.1 and then wanted to downgrade to original stock rom.

 

[TomJ2]

Opens LG Mobile Support Tool, then "Connection To Server Failed" error. Stops there. No joy on this "fix"

Any suggestions why?

 

[Srinivas.devineni]

Will this unlock the phone as well ?

 

[Nitsuj2003l]

LG Leon H345 KDZ Stock Firmware Download brick fix works

LG Leon H345 KDZ Stock Firmware Download brick fix works

This works 100%! Please be aware that this is a more direct link to the KDZ Firmware! It will take you straight to the page that you need to be at without having to worry about your IMEI number at all! It has the KDZ Firmware image for all countrys and make and models of this phone!

lg-phone-firmware.com/index.php?id_mod=171

Also, be aware that there are more download options than what you see up top! I almost downloaded the wrong file for my phone this way! This is because it had the tmobile h345 leon right there uptop so I just clicked on it and started downloading it. However when you scroll down you'll see that there is a USA section that actually has several different versions for the same phone! Most notably the V10d, v10e, and the v10f! When making your selection look at the back of the phone behind the battery under neither the IMEI number and you'll see what version you have. Mine was the v10e, v10d is whats at the top under most downloaded so please make sure that you pay attention and don't make the same mistake that I almost made!

I also made another discovery. If you are unable to run the flash tool then that means that you need to download Visual C++ runtime Libary.

Another thing, when running the flash tool you may notice that it attempts to connect to a server and then has and error and says that it failed. It will happen as its flashing the phone and you see the bar moving percentage wise. However, do not be alarmed and do not close out of the app and try again! If you look at your phone you'll see that the car is still moving and that files are still being updated!

Also, even once it gets to a 100% it will still take a few minutes to complete so dont' worry about that!

---------- Post added at 11:59 PM ---------- Previous post was at 11:55 PM ----------

Will this unlock the phone as well ?

This will not unlock this phone! However you can use the new version of KingRoot and that will do it!

---------- Post added 12th December 2015 at 12:04 AM ---------- Previous post was 11th December 2015 at 11:59 PM ----------

Opens LG Mobile Support Tool, then "Connection To Server Failed" error. Stops there. No joy on this "fix"

Any suggestions why?

Yes, actually I do. In my last post i stated that that does occur every time. However, you don't have to worry, just don't close the program and wait. If you look at your phone you notices that it will continue to update the even though it has that error, Once the phone is done updating and reboots. You'll see it updating the applications on the phone! An you'll be good to go!

So there IS JOY, in the FIX after all! Trust me, I just did it! :good:

---------- Post added at 12:15 AM ---------- Previous post was at 12:04 AM ----------

Opens LG Mobile Support Tool, then "Connection To Server Failed" error. Stops there. No joy on this "fix"

Any suggestions why?

Yes it does say that. A screen pops up with an OK button and tell you that the connection to the server failed and asks you if you would like to cancel the update. Just ignore it and wait and watch you phone and you'll see it update.

Also, on doing another phone i've noticed that the Read Phone command when you first press the normal flash button can cause the application to crash for some reason. However, if you just sick that part and press START then you'll be able to proceed as normally and it will work just fine!:good:

 

[keitomoleta]

i use twrp recovery in my lg leon but the problem is i cant boot back to my phone

hello guys, my problem is my phone can't boot up to my android device, its still booting in twrp, i use the method but it won't go to download mode, please i need help(

 

[ayoub lg leon]

i cant entre to download and boot the phone mode when i try to downgrade from 10c to 10b help

 

[Acid2910]

Thanks, its work, tks God

 

[erikandersen880]

Thank you very much for the instruction.