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Unbrick your dead-boot lumia... WITHOUT JTAG!

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By gmirz2005, Senior Member on 28th November 2018, 01:03 PM
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Welcome everybody...
The wait is over...
After not sleeping for 6 days long...
I did this...
!RECOVER YOUR LUMIA WITH DEAD-BOOT WITHOUT ANY JTAG!!!

So... after many testings, you bricked your phone...
Now it doesn't boot and even worse, an error message pops up on PC when connecting the device, "The device is not recognized"...
You are hopelessly crying...
But today everything changes!!
I have the way to recover the device...
Here's the instructions.

1. Get a cheap data micro usb cable.
2. Cut it using scissors
3. Get all the wires connected
4. Now get the green and black wires.
5. Get a button
6. Connect the green wire to the one contact of the button, and the black wire to the another.
7. Now connect the cable to the PC, BUT NOT TO THE PHONE!
8. Now get your bricked phone.
9. Remove the back cover even if the battery is not removal.
10. Disconnect the battery. (I don't care that it's not removable, you can do it!)
11. Reconnect the battery
12. With one hand, press and hold the button.
13. And with another hand, connect the another end of the cable to the phone.
14. Now hold the button for 10 seconds.
15. Release the button
16. And...
17. VOILA! Now your phone is being detected as QHUSB_DLOAD or else.
18. Now just open WDRT and start recovering your phone!
My Lumia 925 is detected in QUALCOMM Modem Mode, or it will be shown as USB Input Device in device manager, with VID 05C6 PID F006 so maybe yours would detect in that mode too! I am doing some more research about how to unbrick the device from this mode.

[UPDATE] Found the drivers! Here's the download link! https://androidfrog.com/142gt2
Also here's the picture for making EDL cable with scheme...
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16th December 2018, 03:41 AM |#2  
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Can you explain why you think this works?

I do this to Lumias that don't get detected but without cutting my USB cable. Pop the battery cable off the board and plug the cable into the phone. Then plug the battery cable ribbon back into the motherboard. Worked for me that way...
17th December 2018, 11:39 AM |#3  
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Quote:
Originally Posted by nate0

Can you explain why you think this works?

I do this to Lumias that don't get detected but without cutting my USB cable. Pop the battery cable off the board and plug the cable into the phone. Then plug the battery cable ribbon back into the motherboard. Worked for me that way...

Sorry, but there are Lumias in the wild that doesn't support that way of connection.
They just don't get connected.
17th December 2018, 01:56 PM |#4  
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Quote:
Originally Posted by gmirz2005

Sorry, but there are Lumias in the wild that doesn't support that way of connection.
They just don't get connected.

Right, I get that.
My question is more about if you understand what is happening when you trigger it to cycle on this way?
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19th December 2018, 07:05 PM |#5  
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Quote:
Originally Posted by nate0

Right, I get that.
My question is more about if you understand what is happening when you trigger it to cycle on this way?

When you make the edl cable and hold the button while turning the lumia on, the cable works like a short jig. As in every device, the CPU is "starting" first, there's command that is implemented in the CPU that switches the device to EDL mode but in this case, as the boot is dead, it switches to Qualcomm F006 Mode in other words, Qualcomm Modem Mode, which is normal for hard bricked devices.
I read a guide about unbricking a DragonBoard 410c but it's done using some base firmware files which we don't have.
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19th December 2018, 07:32 PM |#6  
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Quote:
Originally Posted by gmirz2005

When you make the edl cable and hold the button while turning the lumia on, the cable works like a short jig. As in every device, the CPU is "starting" first, there's command that is implemented in the CPU that switches the device to EDL mode but in this case, as the boot is dead, it switches to Qualcomm F006 Mode in other words, Qualcomm Modem Mode, which is normal for hard bricked devices.
I read a guide about unbricking a DragonBoard 410c but it's done using some base firmware files which we don't have.

Perfect! This is what I needed. Thanks.

My next question would be, how does this change for USB type c windows phone hardware or is it even applicable?

I'm assuming it should be in some way applicable, but it might depend on the device. So what might work for Lumias might not apply to Alcatel hardware etc. or vice versa.

I ask this because I have a few hard bricked devices either in QC USB modem mode or the like.

Another question would be can this method be used to boot a device into edl/USB modem mode even if it is not hard bricked yet?
26th December 2018, 08:19 AM |#7  
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Quote:
Originally Posted by nate0

Perfect! This is what I needed. Thanks.

My next question would be, how does this change for USB type c windows phone hardware or is it even applicable?

I'm assuming it should be in some way applicable, but it might depend on the device. So what might work for Lumias might not apply to Alcatel hardware etc. or vice versa.

I ask this because I have a few hard bricked devices either in QC USB modem mode or the like.

Another question would be can this method be used to boot a device into edl/USB modem mode even if it is not hard bricked yet?

Answering to your Question 1:
No, this is not applicable for USB Type C hardware Windows Phones, as they run completely differently (which I didn't do research about).
Answering to your Question 2:
No, this only works with Lumias with Bootloader Spec A, and not with other brand manufactured Lumias.
Answering to your Question 3:
Yes you can enter the QHUSB_DLOAD mode if the device is not even bricked.
9th January 2019, 06:14 PM |#8  
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hi dude, i have a problem my computer detects the phone as QHSUSB_BULK, do you think this tutorial can work? regards
14th January 2019, 03:41 PM |#9  
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Quote:
Originally Posted by Finsther

hi dude, i have a problem my computer detects the phone as QHSUSB_BULK, do you think this tutorial can work? regards

I don't know at this moment as I really screwed up my Lumia (battery blown).
But I think it will...
20th January 2019, 03:27 PM |#10  
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Could this work without disconnecting the battery? What is the reason for that?
I have a Lumia 1020 with the problems listed in this link: https://forum.xda-developers.com/sho...&postcount=830
thor2 seems to be useless with the same "authentication error" and WDRT also doesn't work.

Edit: Also, why is your battery blown? Is it because of this process?
21st January 2019, 11:08 AM |#11  
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Quote:
Originally Posted by Tiago117

Could this work without disconnecting the battery? What is the reason for that?
I have a Lumia 1020 with the problems listed in this link: https://forum.xda-developers.com/sho...&postcount=830
thor2 seems to be useless with the same "authentication error" and WDRT also doesn't work.

Edit: Also, why is your battery blown? Is it because of this process?

My Battery is blown due to incorrect removing (it was glued)
Yes you need to disconnect the battery so the device looses full power so then you can enter to DLOAD mode
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