[Desire 626 Q&A, Help & Troubleshooting] BOBdotEXE:
This is made for the

AT&T HTC desire 626

, But It should work with other similar 'desire' phones,

just download the image for the model you own.

(Note: the buttons for 'download mode' and 'force reboot' should be similar for most models, look it up if needed)

So after spending around 8 hours trying to unbrick this phone, I finally found a working method!

This is a combo of about 6 guides, and some of my own work. so I'll credit who I can remember.

This guide is not meant to be noob friendly, it expects you to have at least some knowledge of android, and flashing.

Anyway, You'll need a few things.

1. Good Quality Micro USB cord

2. HTC sync manager (official link)

3. Stock Rom

(official links) find your model, and carrier.

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How to unbrick!

(NOTE, this will DELETE ALL DATA, including the built in storage for music/videos)

Step 1: Enter Download mode

unplug your phone, power off, and boot into Download mode, Hold: [Power]+[Volume Down]

[IMG="download mode pic"]http://i.imgur.com/TF11LKim.png[/IMG]

Step 2: run the installer for HTC sync manager. (this will install the drivers we need)

Step 3: uninstall HTC sync manager. (only sync manager, we need to keep the drivers)

Step 4: Pause your anti-virus program, or allow the stock image flashing program.

Yes, I know how shady that sounds,

double check the link, it's an official HTC program.

And yes, flashing firmware over USB is NOT something most programs often need to too. it makes sense it's treated as a virus.

If you're really worried, use a spare PC. [works on windows only]

Step 5: Connect to your phone via USB.

Make sure any other android devices are disconnected.

And if possible connect directly to the main USB ports, avoid using an (external) USB hub

Step 6: Start Flashing!

Run the Flashing program, the name starts with:

RUU_

It may take some time to startup, and you'll need to give it admin rights.

To proceed, you'll just need to keep clicking 'Next',

You'll have to agree to some terms, and eventually you'll see the "upgrade" button, click that to start the process.

It will now start flashing your phone, Your phone may reboot a few times,

and the progress bar will fill up to 100% more than once.

(it flashes each part individually, 'Boot image'. 'system', etc)

The whole process should not take very long, it should be done in well under an hour.

The main program will tell you when it's complete.

The phone will automatically reboot, and the phone will be returned to stock!

[IMG="Done!"]http://i.imgur.com/EKt5GIM.png[/IMG]

Notes:

-This will remove root, or any custom, recovery

-If you plan to sell the phone, please note, this dose not unregister the phone from your google account.

IF you want to sell the phone, re-setup the phone as normal. Then, sign in to your google account, and manually remove it

-This dose NOT re-lock your bootloader.

To re-lock, go back to download mode, and run:

fastboot oem lock

-I am writing this after only 4 hours of sleep, so expect some grammar errors.

And I don't remember all of the buttons prompts from the flashing prompt. but it's very straight forward.

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Here are some issues I had when following other guides online, this may help some with similar issues.

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1. phone stuck at HTC logo screen, can't force power down!

Answer: Hold [power] +[volume up] for 10 seconds, that will reboot the phone

2. I Can't get the software to run. (closes after a few seconds)

Answer: If you're running bit defender, it will block the program, unblock it, then turn off bit defender.

3. I can't get the program to run at all!

Answer: Try re-downloading. if you're on the AT&t 626, then the hash should be: MD5: f4d2bdab11290c367136067a96d3dfaf

4. Program fails to flash (stuck at 0%)

Answer: HTC sync manager seems to interfere with the flashing, uninstall ONLY sync manager!

5. Can't enter download mode

Answer: With your Phone OFF, Hold [Power] + [Volume down] it will take you to a weird screen. that is download mode

6. flashing stuck for more than 10 mins! (progress bar never moves.)

Answer: restart using the same method above for stuck at HTC logo screen, then boot to download mode.

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Sources:

https://www.reddit.com/r/htcone/comments/3o1l0r/htc_desire_626s_stock_rom/

http://www.htc.com/us/support/htc-desire-626-att/howto/658492.html

http://www.modifyandroid.com/stock-roms/htc/how-to-flash-stock-rom-for-htc-desire-626-att/

http://xdaforums.com/desire-626/development/ruu-att-626-t3272165