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[GUIDE] Flash Firmware/Update Bootloader to 3.19 - S-ON, no Stock OS

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By upM8, Junior Member on 16th October 2018, 03:27 AM
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This procedure has only been tested with my personal TMOB101 - x.xx.111.x Phone
Since there was no guide on how to do it I mixed and matched what I found to my personal needs.


Use at own risk

I doubt many people will need this but this might end some hour-long research sessions and save the sanity of a couple of people.

Requirements:
-PC with USB 2.0 ports
-unlocked bootloader
-HTCDev Account to lock/unlock bootloader
-Installed One M8 Drivers
-Uninstalled HTC Sync (not disabled)
-Portable Minimal ADB & Fastboot
-htc_fastboot.exe https://drive.google.com/file/d/0B8L...dKVEdHX1U/view source: @EddyOS here
-Signed Firmware.zip matching your phones CID


-S-OFF not required

If there are multiple firmware updates I strongly suggest to flash them in succeeding order

Step 1. - preparation:
Create a folder containing Portable Minimal ADB & Fastboot
Download htc_fastboot.exe and place it in the same folder
Download your required firmware zip file and place it in the same folder, rename it to firmware.zip



Step 2. - execution
start your phone in bootloader mode by pressing the power and the volume down button
connect it to an USB 2.0 port
Run cmd-here.exe from the minimal ADB & Fastboot package as admin.

reboot to bootloader
Code:
fastboot reboot-bootloader
lock bootloader
Code:
fastboot oem lock
reboot to RUU
Code:
fastboot oem rebootRUU
Your phone should reboot to display a silver HTC logo

Flash firmware update using htc_fastboot
Code:
htc_fastboot zip firmware.zip
wait until the phone indicates the finished process
reboot to bootloader
Code:
fastboot reboot-bootloader
Unlock bootloader following HTCs instructions
https://www.htcdev.com/bootloader/unlock-instructions

Flash your desired recovery and your desired rom as usual afterwards


__________________________________________________ ___

Useful to know:

I had no backup to stock available and wanted to upgrade my old phone from an outdated CMod build to a more recent LineageOS build that required Bootloader 3.19 - my version was 3.18

Whats your cid?
Code:
fastboot oem readcid
What firmware version does my CID require?
Check out @ckpv5 s post here
 
 
25th October 2018, 05:45 PM |#2  
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What is the purpose of flashing TWRP in this guide?
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25th October 2018, 05:56 PM |#3  
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Quote:
Originally Posted by redpoint73

What is the purpose of flashing TWRP in this guide?

good point, there is no purpose in flashing TWRP. I wrote this down at like five in the morning just as I did this after tinkering the whole night.
I will remove the step in the guide
25th October 2018, 06:03 PM |#4  
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You realize there are already instructions at the bottom of ckpv5's thread Post #5?

https://forum.xda-developers.com/sho...34&postcount=5
25th October 2018, 06:16 PM |#5  
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Quote:
Originally Posted by redpoint73

You realize there are already instructions at the bottom of ckpv5's thread Post #5?

https://forum.xda-developers.com/sho...34&postcount=5

This did not work for me - either that or I messed up at some point.
28th November 2018, 02:10 PM |#6  
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Quote:
Originally Posted by upM8

This did not work for me - either that or I messed up at some point.

Definitely pilot error. Maybe just some nuance you missed. This process has been done successfully by probably hundreds of users.
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