T-mobile LG G4 H811 Software Update, H81120x Stock kdz firmware available for download

LG has released a new software update for the T-mobile LG G4 H811. The Update is arriving as software version H81120x.

It is still Android 6.0 software update with the November 2017 Google Android Security Patch. The Update is available now via FOTA and LG bridge, After the update, Your phone’s software version is H81120x.

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The stock kdz firmware build H81120X is also available for download from LG original server,  Grab it from below link:


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Please notes that you will need XDM download manager to download the file from above links.

To unbrick/restore LG G4 H811 back to Stock:

  1. Install LG USB drivers
  2. Install LG UP
  3. Install LG G4 H811 DLL

Put your phone into download mode first, run the LG UP software.

From LG UP main screen, Choose “Upgrade” and CLICK “BIN/File” to select the kdz file you just downloaded

Click start to load the kdz firmware onto your phone

Wait until it is 100% complete

Now Your LG G4 H811 is back to stock.

If you can not get your phone into download mode, Your G4 is stuck on Qdloader 9008 mode. Your Phone is hard bricked, You will need the Board Diag Tool to fix it.

To learn more about T-mobile LG G4 H811VK software update history, check T-mobile official page https://support.t-mobile.com/docs/DOC-28979.