[LG Leon Guides, News, & Discussion] broad_st_bully:
{WORKING ROOT FOR T-MOBILE LG LEON LTE 5.1.1 LOLLIPOP}

.....so after a week & some change of endless searching for a working root method, following tons of half-assed directions, trying about 4-5 "1-click root scripts" and installing a bunch of different root APK's with absolutely no luck I finally successfully rooted the

T-Mobile LG Leon 5.1.1 Lollipop

by putting together a few things I found on this forum.....

This method (with files linked to this post) ONLY works on the

T-Mobile LG Leon LTE 5.1.1 Lollipop

by downgrading to the previous 5.1.1 Lollipop firmware before the current version.....I did not try it on the MetroPCS variant so please do not inbox me asking "hey bro does this work on MetroPCS??" because I do not know.

It will more-than-likely work if you follow the instructions but you'll need the MetroPCS firmware .kdz file, not the one linked to this post...just find the file and follow the instructions below.

You need the following;

T-Mobile LG Leon Drivers-----> Windows | MAC

LG Flash Tool 2014-------------> LG Flash Tool 2014

LG Leon H34510d kdz file-----> H34510d kdz file

Kingroot 4.5---------------------> Kingroot 4.5

Once you've downloaded the above files follow these directions to

successfully

root your LG Leon from T-Mobile.

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~BACKUP WHATEVER YOU DO NOT WANT LOST~

~This method will wipe all your apps, pictures, etc.~

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|[ INSTRUCTIONS]|

1.) Download & extract above files to desktop.

2.) Put device in download mode by powering off completely. Then, while the phone is still off, hold the "volume up" button for 2-3 seconds and insert the USB wire (make sure the USB is connected to your desktop/laptop) until download mode screen appears.

3.) Run LG Flash Tool 2014

4.) Once the LG Flash Tool is open, leave (or select) "Select Type" As "CDMA".

5.) Change "PhoneMode" to "CS_EMERGENCY".

6.) Click the folder icon to browse your computer and select the "H34510d_00.kdz" file.

7.) Click the button that says "CSE Flash".

8.) Click on the Start button.

9.) Click on "Clear Update Registry".

10.) For "Country" select "Different Country"

11.) For "Language" select "English" (or whatever language you use).

12.) Click "Okay" and let the LG Flash Tool recognize your device. The Flash Tool will do it's thing and load the file onto your device...it takes a minute or two so just let the process run it's course. Once it hits 100% your phone will reboot once or twice- leave it plugged in -you will see the Android with the spinning blue "thing" in his belly for a second or two then the device will reboot. Wait until the Flash Tool progress bar is at 100% on your computer and your phone shows the setup page (like when you turn it on the very first time) and unplug the device.

***Once the downgrade starts you may see a popup window that says something like "Can not connect to servers" but it is just an error...you can see the timer & progress bar running behind the popup, just ignore it.***

You are now downgraded to the 10d firmware {H34510d}.

13.) Install Kingroot 4.5 and run that and it will take about 30-60 seconds to acheive root.

###ENJOY ROOT ACCESS###

If, for some wild, crazy reason this fails and you soft-brick your device (which shouldn't happen if you follow the directions) check this thread to unbrick: Unbrick T-Mobile LG Leon

Thanks to Yazuken1 and IPRJ25 for some of the info that helped me put this together.