[How to] Install unlock bootloader for A100/A101

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sinan978

New member
Mar 7, 2015
1
0
Need help with Iconia A100

What if my device doesn't have os, nd I can't turn it on, it freezes on ACER logo...Is there any way to unlock the boot loader, 'nd can anyone tell me why can't I select apply update from external storage in the sistem recovery? thanks
 

chicken choker

New member
Sep 20, 2016
1
0
I have the same exact problem on my acer, only i can get a stage further, after holding volume up and power, i get this: Bootloader version 0.03.06-ics (unlock mode)
Erasing cache before sd update...

Sd update cmd: recovery
--update_package=SDCARD: update.zip

Booting recovery kernel image,

Then i get the android man with the spinning blue thing in his stomach, it spins for a while the i get the dead android with red triangle. Ideas please?
 

aluminumfox

Member
Feb 6, 2017
11
1
Nobody's probably even looked at this thread in 2 years but I am unable to execute the install-eng.bat and get results. I can run as admin (windows 10 64 bit) and it will very briefly flash a command prompt screen but it goes away after a split second and then nothing on the tablet, nothing on my laptop, etc. Strange and frustrating. Am I just an idiot, am I missing something?
 

joe34

Senior Member
Mar 8, 2017
80
19
Nobody's probably even looked at this thread in 2 years but I am unable to execute the install-eng.bat and get results. I can run as admin (windows 10 64 bit) and it will very briefly flash a command prompt screen but it goes away after a split second and then nothing on the tablet, nothing on my laptop, etc. Strange and frustrating. Am I just an idiot, am I missing something?
Are you following Pio Masaki's guide? https://forum.xda-developers.com/showthread.php?t=1711125

According to my notes, I rooted first before installing the unlocked bootloader. I used ZeroNull's Simple Root Method - http://forum.xda-developers.com/showthread.php?t=1531646

Best of luck!
 

aluminumfox

Member
Feb 6, 2017
11
1
Are you following Pio Masaki's guide? https://forum.xda-developers.com/showthread.php?t=1711125

According to my notes, I rooted first before installing the unlocked bootloader. I used ZeroNull's Simple Root Method - http://forum.xda-developers.com/showthread.php?t=1531646

Best of luck!


EDIT: I got it to work using Linux. Thanks!


I was following the guide, yeah. I was not able to get to a point where I could actually choose the unlock on the tablet's screen. I tried doing commands over adb but I could only get to a point where it would tell me something like "this is not supported in lock mode" or something like that. I am rooted properly but that's as far as I've gotten. Thanks for the reply, I'm surprised anyone is looking at this thread.
 
Last edited:

bibob64

New member
Dec 1, 2019
3
1
Three years after the last message, I appeal to you to download the archive to unlock the bootloader. It's been two days that I've been searching on the web and I can't find anything. It would be nice from you. Thank you in advance.
Cordially.
 
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kakemate

New member
Oct 28, 2016
3
3
Original article is published on this site and created by ZeroNull and vdsirotkin (4pda.ru).

WARNING - If it works on your device, be careful, as with an unlocked bootloader you can brick you tab faster than you can imagine.

How to:
0. It has been tested on the A100 ICS firmware. This bootloader doesn't work with HC firmware.
1. The tablet should be already rooted and charged more than on 30 %. Сonnect the tablet to the computer and power on.
2. Download this archive. Unpack it to any place.
3. Open the directory with the unpacked archive. Execute file:
for windows with the rights of administrator
Code:
install-eng.bat
for Linux with the rights of root
Code:
bash ./btl-a200.sh
4. Wait. The tab will show a screen with two icons. One for lock and on for unlock. I used the volume down to highlight the one I wanted and the volume up select it.

Then you have to reboot, using, for example, this command:
Code:
sudo fastboot reboot-bootloader

And you'll get the message on the screen when it comes up in fastboot mode.

Code:
"Bootloader v0.03.06-ICS(UnlockMode): Starting Fastboot USB download protocol"

It's unlocked and available for fastboot flashing, etc.
---
For return original bootloader:
for Linux with the rights of root
Code:
bash ./btl-a100.sh

PS: After unlocking bootloader there is a noncritical distortions of the picture at a stage of initial loading.
Seems like the link its down, I'll be really thankful if u can put ir online again, since I look everywhere for that file and can't find it. Thanks a lot!
 
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  • 53
    Original article is published on this site and created by ZeroNull and vdsirotkin (4pda.ru).

    WARNING - If it works on your device, be careful, as with an unlocked bootloader you can brick you tab faster than you can imagine.

    How to:
    0. It has been tested on the A100 ICS firmware. This bootloader doesn't work with HC firmware.
    1. The tablet should be already rooted and charged more than on 30 %. Сonnect the tablet to the computer and power on.
    2. Download this archive. Unpack it to any place.
    3. Open the directory with the unpacked archive. Execute file:
    for windows with the rights of administrator
    Code:
    install-eng.bat
    for Linux with the rights of root
    Code:
    bash ./btl-a200.sh
    4. Wait. The tab will show a screen with two icons. One for lock and on for unlock. I used the volume down to highlight the one I wanted and the volume up select it.

    Then you have to reboot, using, for example, this command:
    Code:
    sudo fastboot reboot-bootloader

    And you'll get the message on the screen when it comes up in fastboot mode.

    Code:
    "Bootloader v0.03.06-ICS(UnlockMode): Starting Fastboot USB download protocol"

    It's unlocked and available for fastboot flashing, etc.
    ---
    For return original bootloader:
    for Linux with the rights of root
    Code:
    bash ./btl-a100.sh

    PS: After unlocking bootloader there is a noncritical distortions of the picture at a stage of initial loading.
    2
    ok i did get back to it it seemed to go thru, when i got to the sudo reboot part it said sudo unreconized command but on tab screen it just said to reboot so i powered off and back on seems to be working tab rebooted is there anyway to check it

    Sudo is a linux thing, windows won't know what it is. If your script is using sudo then its the linux version.

    Not sure what you mean to check, if you mean it did the process for unlocking (the screen with two icons) then you can check on the acer screen, upper left, in white text, will say bootloader whatever version (unlock mode). If it doesn't say (unlock mode) then it's not unlocked. It'll probably say something like bootloader 03.06 ICS (unlock mode). If it says 03.06 ICS but no unlock mode, or locked, you'll need to pass the command for it:
    adb reboot bootloader
    once the usb download whatever screen appears
    fastboot oem unlock
    quickly hit volume - then volume +
    You have got to be quick, its like a half second window
    once thats done enter
    fastboot reboot
    and the tab will reboot.

    Thats basically the manual way of doing it once the a200 bootloader has been pushed in the previous portion of the script.
    2
    my concern is that using the update.zip without the correct bootloader could keep the tablet from booting up. Anybody out there know this for sure?

    I successfully downgraded my A101 from leaked A100 ICS back to stock A101 HC using standard decrypted update.zip (Acer_A101_0.000.00_2.004.01_EMEA_GB.zip).
    So if you restore the A100 locked bootloader first you should be fine with downgrading to HC.
    1
    oh nice! I assume, if you could use the a500 patched bootloader as well, yes? That one is actually the same version as the A100 ics bootloader.

    Thanks for the script.
    1
    Original article is published on this site and created by ZeroNull and vdsirotkin (4pda.ru).

    WARNING - If it works on your device, be careful, as with an unlocked bootloader you can brick you tab faster than you can imagine.

    How to:
    0. It has been tested on the A100 ICS firmware. This bootloader doesn't work with HC firmware.
    1. The tablet should be already rooted and charged more than on 30 %. Сonnect the tablet to the computer and power on.
    2. Download this archive. Unpack it to any place.
    3. Open the directory with the unpacked archive. Execute file:
    for windows with the rights of administrator
    Code:
    install-eng.bat
    for Linux with the rights of root
    Code:
    bash ./btl-a200.sh
    4. Wait. The tab will show a screen with two icons. One for lock and on for unlock. I used the volume down to highlight the one I wanted and the volume up select it.

    Then you have to reboot, using, for example, this command:
    Code:
    sudo fastboot reboot-bootloader

    And you'll get the message on the screen when it comes up in fastboot mode.

    Code:
    "Bootloader v0.03.06-ICS(UnlockMode): Starting Fastboot USB download protocol"

    It's unlocked and available for fastboot flashing, etc.
    ---
    For return original bootloader:
    for Linux with the rights of root
    Code:
    bash ./btl-a100.sh

    PS: After unlocking bootloader there is a noncritical distortions of the picture at a stage of initial loading.
    Seems like the link its down, I'll be really thankful if u can put ir online again, since I look everywhere for that file and can't find it. Thanks a lot!