Recover preloader?

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alohahe3000

Senior Member
May 11, 2007
60
7
I have an issue after flashing Aerom: Unfortunately I forgot to untick preloader when I flashed the rom. Installation went fine but device is not detected anymore by preloader driver. I tried different windows PCs without success. Flashing with SP Tools is not possible.
Bootloader (and ADB) mode working. Fastboot detects the device (in device manager it is listed as HTC Dream) In developer settings ADB and oem unlock are Activated. If I try to unlock boot loader via "fastboot oem unlock", I cannot select "Yes" (Volume up) on the device, only "No" (Volume Down)....not rooted, no custom recovery
How can I recover the right preloader or install custom recovery?
 
Last edited:

nephster

Member
Sep 19, 2010
14
4
I have an issue after flashing Aerom: Unfortunately I forgot to untick preloader when I flashed the rom. Installation went fine but device is not detected anymore by preloader driver. I tried different windows PCs without success. Flashing with SP Tools is not possible.
Bootloader (and ADB) mode working. Fastboot detects the device (in device manager it is listed as HTC Dream) In developer settings ADB and oem unlock are Activated. If I try to unlock boot loader via "fastboot oem unlock", I cannot select "Yes" (Volume up) on the device, only "No" (Volume Down)....not rooted, no custom recovery
How can I recover the right preloader or install custom recovery?

Having just gone through the joy of unbricking my new P9000, after I didn't untick preloader when flashing, I've learned more today about using "meta-mode" with a MediaTek phone than I ever wanted to!
This is what debricked my phone. I wonder if this is of use to you? I make no claims it won't brick your device, so please read up on using this mode beforehand!!

Have Device Manager open to see what's going on with drivers
In SP Tools, load a stock ROM and tick *just* the Preloader. Hit Download.
Then hold down *only* the Volume + key (keep it pressed!) and plug the phone in. This bypasses the higher functions of the phone's memory and loads a basic driver - Mediatek USB VCOM will appear in the Device Manager under Ports. Keep Vol + pressed and it will flash the Preloader part of the memory.
With the Preloader flashed, the other parts of the phone (such as recovery) should be flashable, as hopefully the preloader driver will now load.
 
Last edited:

DaisyF

Senior Member
Dec 16, 2009
53
20
50
Samsung Galaxy S8
Samsung Galaxy S9
[Solved] Bricked -Brom Protocol Error- during flashing recovery with SP Flash Tool

tldr; Doing nothing fixed my phone

In my case, I received a "Brom Protocol Error" during the flashing of a recovery with SP Flash Tools. Phone was bricked, didn't turn on anymore.

When connecting to my pc, I would see "USB VCom Driver" be active but whatever I tried, SP Flash Tools would never start flashing again. The phone also never activated the "USB preloader Driver". Trying to get to meta-mode with connecting USB while pressing Volume+ didn't work either.

Solution worked out to be : Let the phone drain its battery. Over a few days I had removed the back cover and had been watching YouTube-movies about shorting test-points, the phone laying on my desk not charging. Right before I desoldered the battery I connected the phone again and pfew : It went to "USB Preloader Driver" and I could flash again :)
 
Last edited:
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VidiChannel

New member
Aug 28, 2010
2
0
Connect to P9000, YES

Was completely lost on how to flash a new ROM to the phone. Have used SP Flash many times before. Without knowing the +Volume trick was completely lost. Wasted weeks on this. Thank you alohahe3000.
Having just gone through the joy of unbricking my new P9000, after I didn't untick preloader when flashing, I've learned more today about using "meta-mode" with a MediaTek phone than I ever wanted to!
This is what debricked my phone. I wonder if this is of use to you? I make no claims it won't brick your device, so please read up on using this mode beforehand!!

Have Device Manager open to see what's going on with drivers
In SP Tools, load a stock ROM and tick *just* the Preloader. Hit Download.
Then hold down *only* the Volume + key (keep it pressed!) and plug the phone in. This bypasses the higher functions of the phone's memory and loads a basic driver - Mediatek USB VCOM will appear in the Device Manager under Ports. Keep Vol + pressed and it will flash the Preloader part of the memory.
With the Preloader flashed, the other parts of the phone (such as recovery) should be flashable, as hopefully the preloader driver will now load.
 

RAGT2001

New member
May 27, 2018
1
0
Didn't appear

Having just gone through the joy of unbricking my new P9000, after I didn't untick preloader when flashing, I've learned more today about using "meta-mode" with a MediaTek phone than I ever wanted to!
This is what debricked my phone. I wonder if this is of use to you? I make no claims it won't brick your device, so please read up on using this mode beforehand!!

Have Device Manager open to see what's going on with drivers
In SP Tools, load a stock ROM and tick *just* the Preloader. Hit Download.
Then hold down *only* the Volume + key (keep it pressed!) and plug the phone in. This bypasses the higher functions of the phone's memory and loads a basic driver - Mediatek USB VCOM will appear in the Device Manager under Ports. Keep Vol + pressed and it will flash the Preloader part of the memory.
With the Preloader flashed, the other parts of the phone (such as recovery) should be flashable, as hopefully the preloader driver will now load.

Mediatek USB VCOM didn't appear. Instead, "unkown device" appeared under "other devices". Can someone help me because I'm about to finish flashing my Tablet and it's Nextbook 7 Premium. Thanks a lot!
 

LastCaressss

Member
Dec 22, 2010
11
0
Having just gone through the joy of unbricking my new P9000, after I didn't untick preloader when flashing, I've learned more today about using "meta-mode" with a MediaTek phone than I ever wanted to!
This is what debricked my phone. I wonder if this is of use to you? I make no claims it won't brick your device, so please read up on using this mode beforehand!!

Have Device Manager open to see what's going on with drivers
In SP Tools, load a stock ROM and tick *just* the Preloader. Hit Download.
Then hold down *only* the Volume + key (keep it pressed!) and plug the phone in. This bypasses the higher functions of the phone's memory and loads a basic driver - Mediatek USB VCOM will appear in the Device Manager under Ports. Keep Vol + pressed and it will flash the Preloader part of the memory.
With the Preloader flashed, the other parts of the phone (such as recovery) should be flashable, as hopefully the preloader driver will now load.

I know this was a LONG time ago, but after spending two days trying so many things to save my p9000 this finally did it. Thank you VERY much!
 

nephster

Member
Sep 19, 2010
14
4
Wonderful :) I only had the Elephone a few days, mine had a very temperamental SIM slot and I couldn't get NFC to work for anything useful. A shame, as it had lots of potential, I thought. Glad you are getting your money's worth out of your one!
 

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    I have an issue after flashing Aerom: Unfortunately I forgot to untick preloader when I flashed the rom. Installation went fine but device is not detected anymore by preloader driver. I tried different windows PCs without success. Flashing with SP Tools is not possible.
    Bootloader (and ADB) mode working. Fastboot detects the device (in device manager it is listed as HTC Dream) In developer settings ADB and oem unlock are Activated. If I try to unlock boot loader via "fastboot oem unlock", I cannot select "Yes" (Volume up) on the device, only "No" (Volume Down)....not rooted, no custom recovery
    How can I recover the right preloader or install custom recovery?

    Having just gone through the joy of unbricking my new P9000, after I didn't untick preloader when flashing, I've learned more today about using "meta-mode" with a MediaTek phone than I ever wanted to!
    This is what debricked my phone. I wonder if this is of use to you? I make no claims it won't brick your device, so please read up on using this mode beforehand!!

    Have Device Manager open to see what's going on with drivers
    In SP Tools, load a stock ROM and tick *just* the Preloader. Hit Download.
    Then hold down *only* the Volume + key (keep it pressed!) and plug the phone in. This bypasses the higher functions of the phone's memory and loads a basic driver - Mediatek USB VCOM will appear in the Device Manager under Ports. Keep Vol + pressed and it will flash the Preloader part of the memory.
    With the Preloader flashed, the other parts of the phone (such as recovery) should be flashable, as hopefully the preloader driver will now load.
    1
    [Solved] Bricked -Brom Protocol Error- during flashing recovery with SP Flash Tool

    tldr; Doing nothing fixed my phone

    In my case, I received a "Brom Protocol Error" during the flashing of a recovery with SP Flash Tools. Phone was bricked, didn't turn on anymore.

    When connecting to my pc, I would see "USB VCom Driver" be active but whatever I tried, SP Flash Tools would never start flashing again. The phone also never activated the "USB preloader Driver". Trying to get to meta-mode with connecting USB while pressing Volume+ didn't work either.

    Solution worked out to be : Let the phone drain its battery. Over a few days I had removed the back cover and had been watching YouTube-movies about shorting test-points, the phone laying on my desk not charging. Right before I desoldered the battery I connected the phone again and pfew : It went to "USB Preloader Driver" and I could flash again :)