How to use the Guru Bootloader Reset Tool
This tool will allow you remove the Tampered flag from your bootloader. It will also allow you to easily Lock and Unlock your Bootloader directly from recovery.
In order to do this you MUST BE S-Off. If you are still S-On and would like to do this then you need to gain S-Off first. See my guide for gaining S-Off HERE.
Root is not required.
Before using this tool you need to be sure you are using the latest version of recovery as the M7 U/UL TWRP requires at least version 22.214.171.124 for this package to work. The current downloads for both CWM and TWRP can found below:
***[UPDATE] – It seems that the latest TWRP 126.96.36.199 has been pulled due to some minor issues. If your TWRP version doesn’t work please use CWM for now until a updated TWRP release is made.
This should work for Verizon and Sprint as well, however they have different versions of these recoveries, so I am unable to verify.
To use the tool simply copy the zip file to your phone and then boot to your custom recovery and choose install. Then browse to where you copied the file and select it. The aroma installer will begin. Follow the steps outlined in the pictures below and choose the options you want to run.
The Download for the Guru Bootloader Reset Tool:
**S-OFF is required
Simply install from custom recovery CWM or TWRP.
Make sure you have the latest version of recovery as M7 U/UL TWRP requires at least version 188.8.131.52 for this package to work.
The latest M7 U/UL TWRP can be downloaded HERE.
The latest M7 U/UL CWM can be downloaded HERE.
This should work for Verizon and Sprint as well, however they have different versions of these recoveries, so I am unable to test.
If the installer stays on this screen fore more than a few seconds, then it means you need to delete/format cache. This can be done within both recoveries. You may need to reboot recovery after clearing cache and begin the installer again. This seems to happen more on CWM than TWRP.
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