Digiland DL721-RB Bootloader - General Questions and Answers

Hi everyone. I am new to Andriod and to XDA. Like most, I am trying to root my Android device. I have a Digiland DL721-RB that I am trying to root and it will not let me. This is a 6.0.1 Marshmallow device and it will not work with Kingo ROOT (multiple failed attempts with both ADK and PC version.) I have since factory reset the device and made it into Recovery Mode. The recovery mode shows a build MMB29M.dzr11251051.
Can this help to locate a ROM or method of accessing and unlocking the bootloader? Any assistance would be appreciated.
UPDATE: It appears that fastboot or bootloader is inaccessible via normal means. There is a pin-hole Reset button on the rear of the device that only seems to disconnect power to the entire tablet and just shuts it down. I have attempted multiple combinations of button presses to get into this area but can only access the Recovery Mode. I am using an Ubuntu shell to access the tablet and can get into the
Code:
adb shell
but most areas are "Permission denied." I also attemted
Code:
adb reboot fastboot
which reboots the tablet but gets stuck with a backlit black screen.
I see that 50 people have looked at this post since I created it so I know there is at least a minimal interest in this topic. I have been using this table for about two weeks and it is not a bad device for $40, especially if you just want something that's disposable.
Anyway, I am not looking for someone to unlock it for me. I am looking for suggestions on how to approach this as there is something I am undoubtedly overlooking. Any suggestions (besides getting a new tablet) would be appreciated. This is a challenge and I want to learn more about the process, not just unlocking it. I enjoy the application method of learning.
Thanks in advance for any assistance.

I bought the device 2 hours ago, here in Las Vegas, NV, for $19.00 USD.
I am interested in this thread getting answered.
Thanks.
phoebos

Blank screen
That blank screen IS Fastboot, oddly enough. If you dumped your ROM I can hook y'all up.

osirisale786 said:
Blank screen
That blank screen IS Fastboot, oddly enough. If you dumped your ROM I can hook y'all up.
Click to expand...
Click to collapse
I'm looking for ROM. Hook it up!

Related

Trying to root my g-slate

So I got bored with waiting around for someone else to do it, and decided to take a shot at rooting my G-Slate. I figure it's basically the same as the Xoom, so the same sort of process should work....
My initial game plan was this:
Get into Fastboot
Flash a recovery image
Boot the recovery image
Now "adb shell" is a root shell
Copy a "su" binary into /system/bin
Declare victory
That started out pretty well. Powering on and holding down volume-up gets into fastboot. The fastboot binary on my laptop sees the device. Typing "fastboot oem unlock" claims to work. Flashing the Xoom recovery image [1] claims to work.
But... I can't seem to boot to recovery. Running "adb reboot recovery" just reboots normally. Doing "fastboot boot recovery.img" freezes the device. Booting with down-volume gets me to some sort of LG updater state that might as well be freezing the device. Booting with both volume buttons down either 1.) doesn't boot or 2.) brings me to fastboot. That's all the button combinations.
So I guess my question is this: does anyone have any suggestions for how to proceed?
I really don't want to just blind-flash the Xoom boot.img from the unlock thread, because if that doesn't work my device is bricked until someone either makes a working kernel or somehow extracts the current one.
On the up side, my g-slate is *claiming* to have working fastboot that can flash images. It could be totally lying though.
[1] http://forum.xda-developers.com/showthread.php?t=1038870
Tried the same method. No dice. Right now there has been no luck on anyone's part that i know when it comes to rooting. Shoot we havent even been able to get one of the xda mods to create us our own forum for that matter...i had to go out and create my own. I have tried other methods that worked on my nexus one when none other would but alas still no luck.
I imagine since the g-slate is brand new that its not a question of if it can be rooted, but how and when. I'm going to try one more method i know of that worked on the lg optimus tonight. I'll post here if it works.
Soure code seems to be available too
It also appears the source code is available from LG here .lg.com/global/support/opensource/opensource-detail.jsp
I just did a search under mobile phones for the model number 909
Don't know if that will help anyone here.
I have been hunting all over for root access. fastboot says I unlocked the bootloader but nothing seems to want to take.
XDA Mods, please create a G-Slate Section
HA. member since 2006 and my first post just add a www in front of that link
When the fastboot says Ok it is not telling you that you have unlocked the device. It says ok no matter what you put in. Try unlock and it will say ok as well. If it unlocked the device then it would prompt you on your device with a popup that tells you that you are voiding your warranty and have you hit ok. The device is not unlockable using the 'fastboot oem unlock' command. I have rooted a lot of devices, but never have done anything on an LG device and it is awkward. Vol+ and power gets some form of fastboot. Vol- and power gets download mode, which I am used to from Samsung devices (if we can get an interface like Odin then this becomes a lifesaver and makes the device "virtually" unbrickable). I cannot find any form of recovery. 'Adb reboot recovery' just restarts the device. One interesting this is that pushing both Vol+ and Vol- and power puts the device into what would seem like a bricked device (just use reset button). This same button combination worked on some Samsung devices so something is happening there, but I have not tried enough combos yet to figure it out.
So far as root, well, I have tried z4 (works with nearly all Sammy devices and LG seems to be using a lot of Sammy ideas or at least it looks that way), but to no avail. Gingerbreak apk might work or even the Xoom Root, but the rootboot.img might be different and I have not opened any of that up yet. I did get SU loaded once and in the system, but I could not reproduce it.
I will be working on this some more this weekend (returning the device at some point as it reboots on its own about 5 times a day), and looking into the recovery issue. If anyone has any ideas then please post.
Also, it looks like LG hacked the crap out of the thing to get the SD card to mount and it is weird, so please be aware of that. The SD card mounts every time you plug the device in and there is no way to turn that off. The reason this is important is that some root methods require that the SD card not be mounted, so you will have to unmount the SD card via ADB and with the card being internal I am not too sure it is a good idea, but . . .
I will mark this thread as a favorite and update if I get any where. I know that Cyanogen and Kmobs got G-Slate's recently, so hopefully they can give us a little insight once the device gets to them. I have also contacted LG and @TheLGGirl and asked them to confirm that the bootloader is locked, but have not heard anything back.
Also, the the Acer HC tablet was rooted yesterday using the Gingerbreak root method, and so that is helpful, but it has an SD card (see above).
Sent from my LG-V909 using Tapatalk
I tried the Acer method (GingerBreak) and it does not work. Will look at the logcat in a bit.
Sent from my LG-V909 using Tapatalk
Thanks hourst
I am used to odin (also have a vibrant). Something like that would be a life saver.
Makes sense about the fastboot commands seeming to take.
I was also having reboot issues with mine. I had a handful of reboots each day (about 3 or 4) for the first two days but they have stopped completely now. I have had it for about a week now and have not noticed a reboot since day 2.
I will keep poking around to see if i can come up with anything as well.
Could this help?
Under the impression the G2x root method maybe helpful since they are both LG devices with somewhat similar hardware.
Does anyone know or tried this http://forum.xda-developers.com/showthread.php?t=1056847 to see if it works?
Not sure if I am brave enough yet. But it could be possible the vol up+vol down+power button combo that seems to lock the device is putting it into the mode needed to run the nvflash application.
This really is mostly speculation but could be something to try.
Success
So i got brave.
vol up+vol down+power Device seems to freeze. Plugged in the usb and got a new hardware pop in windows. Listed it as APX device using the drivers in the file listed in my previous link installed successful and the device was found.
That is a far as I went.
im doing the NVFLASH right now... wish me luck and see how far I can go
Any Luck?
Suzannemscott
How did it go? any results or do you have a large brick?
ok i tried. and no luck , i did manage to brick it tho, but i was able to unbrick it phew, back to square one
Did it seem like anything happened? Also what did you do to unbrick it?
To unbrick it i just press the reset button, in the back, quickly hold down Vol+ and Vol- then it goes to a the Gslate screen with the square and then i hold down the reset again and it reboots, maybe i am doin to much but hey it get my Tab back it works!
Gah! Why does it claim to have fastboot when *any* fastboot command except "fastboot devices" just makes it freeze?
I went ahead and built the kernel that LG released and packed it into the clockwork recovery image for the Xoom. Fastboot boot... freeze.
Computer always says this, but I think it's just making fun of me:
downloading 'boot.img'... OKAY
booting... OKAY
I also tried to build and boot a custom kernel with a fb console enabled just to get some feedback, but all it wants to do in response to "fastboot boot" is freeze.
I'm starting to get discouraged here. My 14 day return period ends on Tuesday and I don't really want to get stuck with an unrootable device.
Chandon, would you be able to send me the kernel you built?
I'm sure someone with more expertise and knowledge will be able to root this thing eventually...but right now it seems to be a lot trickier to root than I initially thought. It's not unrootable...just complicated. Over my head by a lot. I don't think I'm going to return it...but I've now resigned to the fact that I may not ever be able to find a working method to root the damn thing myself.
SmellyTunic -
I've uploaded the two kernels I built [1].
They're both built from the v909 kernel source posted by LG[2], following the instructions posted by adrynalyne[3] for building custom android kernels, but I don't have any way to test them aside from the fact that "fastboot boot" doesn't work either straight, with a ramdisk, or with a rebuilt recovery image using the tools in [4].
[1] http://pandion.ferrus.net/gslate/kernels
[2] http://opensource.lge.com
[3] http://forum.xda-developers.com/showthread.php?t=1039854
[4] http://forum.xda-developers.com/showthread.php?t=915808
hourst2 said:
When the fastboot says Ok it is not telling you that you have unlocked the device. It says ok no matter what you put in. Try unlock and it will say ok as well. If it unlocked the device then it would prompt you on your device with a popup that tells you that you are voiding your warranty and have you hit ok. The device is not unlockable using the 'fastboot oem unlock' command.
Click to expand...
Click to collapse
Not entirely true. You said that if you try simply typing in "fastboot unlock", it tells you "OK" as well, right?
Not for me. That only ended up displaying the whole list of fastboot commands.
I agree with you that "fastboot oem unlock" is not unlocking the device though. But what are the alternatives? Everything I've ever rooted has used "oem unlock". I've never even heard of a different command that can be used to unlock a bootloader. I tried a google search and came up with nada.
Hmm...
wich you the best make happen

[Q] UK 3G Xoom - Possible brick? Bootloop after Moray update.

Never like to have to resort to posting myself but I've had a decent look around the web and can't seem to find a solid solution to my problem so I'm hoping to get some specific help
So I have a UK MZ601 3G Motorola Xoom which was happily running Moray 2.2.1 and had been rooted using the universal root method. Decided to update to 2.2.2 and now my Xoom is stuck in a boot-loop on the custom rippling water boot animation.
The tablet hangs on the first line when trying to boot into recovery so for all my efforts cannot access CWM and perform a hard reset and fresh rom install.
I've tried - and I'm assuming I'm correct in thinking this means I cannot get the Xoom to any stage where I can use adb to attempt to get in to recovery or push files to the system etc. this way.
From what I've read on other forum posts - booting holding volume up and power puts the device into an 'RSD' state which is another method of reflashing the device? I've read this requires an 'SBF' file - which I have seen for download - but believe it only works for the US models?
I've left the boot screen looping overnight - so its not an issue of it just being slow. Because of the custom boot screen I obviously can't return it to the shop as I presume its an obvious warranty void?
Would massively appreciate any help in bringing whats looking increasingly like a £500 paper weight back to life.
Thanks
crozuk said:
Never like to have to resort to posting myself but I've had a decent look around the web and can't seem to find a solid solution to my problem so I'm hoping to get some specific help
So I have a UK MZ601 3G Motorola Xoom which was happily running Moray 2.2.1 and had been rooted using the universal root method. Decided to update to 2.2.2 and now my Xoom is stuck in a boot-loop on the custom rippling water boot animation.
The tablet hangs on the first line when trying to boot into recovery so for all my efforts cannot access CWM and perform a hard reset and fresh rom install.
I've tried - and I'm assuming I'm correct in thinking this means I cannot get the Xoom to any stage where I can use adb to attempt to get in to recovery or push files to the system etc. this way.
From what I've read on other forum posts - booting holding volume up and power puts the device into an 'RSD' state which is another method of reflashing the device? I've read this requires an 'SBF' file - which I have seen for download - but believe it only works for the US models?
I've left the boot screen looping overnight - so its not an issue of it just being slow. Because of the custom boot screen I obviously can't return it to the shop as I presume its an obvious warranty void?
Would massively appreciate any help in bringing whats looking increasingly like a £500 paper weight back to life.
Thanks
Click to expand...
Click to collapse
When you press volume up and power, and hold it, it reboots, yeah? Then you wait about three seconds on dual core screen and tap volume down...what happens then? Do you see android recovery in upper left? Or starting fastboot protocol? Where does it hang? Just trying to see where things are going wrong. If you can get into starting fastboot protocol you are in good shape. If you can get into cwm recovery you should be in great shape. Check out the Xoom Heaven thread in General for some info on recovery.
You are most likely far from bricked...almost all of us have recovered from worse situations than you are in now so just keep cool.
okantomi said:
When you press volume up and power, and hold it, it reboots, yeah? Then you wait about three seconds on dual core screen and tap volume down...what happens then? Do you see android recovery in upper left? Or starting fastboot protocol? Where does it hang? Just trying to see where things are going wrong. If you can get into starting fastboot protocol you are in good shape. If you can get into cwm recovery you should be in great shape. Check out the Xoom Heaven thread in General for some info on recovery.
You are most likely far from bricked...almost all of us have recovered from worse situations than you are in now so just keep cool.
Click to expand...
Click to collapse
Thanks for your reply - tried numerous times getting into recovery - get stuck with one line of 'starting fastboot protocol' and seems to hang there.
Have experience rooting and flash etc. and have obviously used adb in the past.
If I could just get to recovery - or a state where I could use adb I would be fine. But as I said in my first post - looks like I can only access an 'RSD' state.
Is there any other way of getting adb access from my PC? All the help for bricked xooms seems to concern US models - and don't want to try anything that will completely write it off!
Thanks again for your help.
Quick update -
Have retried Fastboot - stuck on 'Starting Fastboot protocol support'
Tried Android Recovery - got stuck on a black screen for a long long time but finally booted!
Wiped and re-installed what I know to be a kosher ROM! Was a scary moment there but thanks for your help and reassurance!
crozuk said:
Quick update -
Have retried Fastboot - stuck on 'Starting Fastboot protocol support'
Tried Android Recovery - got stuck on a black screen for a long long time but finally booted!
Wiped and re-installed what I know to be a kosher ROM! Was a scary moment there but thanks for your help and reassurance!
Click to expand...
Click to collapse
If you are still rooted and all, just for safety's sake, make sure to do another nandroid backup and save it to your micro sdcard. Backup, backup, backup. Then also make sure that you have a compatible cwm recovery installed, that will let you access your microsd card. It sounds like you're alright, so, cool.

Need help after bricking my UK WIFI Xoom

Following various threads here how to successfully unlocking and rooting their device, I've failed on so many levels.
At the moment I think my xoom is semi-bricked because its just stuck on the M screen. I've think I got the recovery screen working last night as I was able to go into recover mode but after updates through wifi I think it possibly stopped it.
So when i reboot and go into recovery mode, I get an exclamation mark over an android. I've tried rebooting and just got it to mount back on Fastboot but when I've tried to wipe it and reflesh it to (recovery-Tiamat-R4c-100611-1150-cwm.img) its not doing what its suppose to do and giving me "unknown partition, Failed to process command error (0x300003)
Any ideas what I need to do?
Btw, I can reboot, voldown and then volup to choose the 3 options but like I said I can't get into the recovery mode properly.
Schizophonic said:
Following various threads here how to successfully unlocking and rooting their device, I've failed on so many levels.
At the moment I think my xoom is semi-bricked because its just stuck on the M screen. I've think I got the recovery screen working last night as I was able to go into recover mode but after updates through wifi I think it possibly stopped it.
So when i reboot and go into recovery mode, I get an exclamation mark over an android. I've tried rebooting and just got it to mount back on Fastboot but when I've tried to wipe it and reflesh it to (recovery-Tiamat-R4c-100611-1150-cwm.img) its not doing what its suppose to do and giving me "unknown partition, Failed to process command error (0x300003)
Any ideas what I need to do?
Btw, I can reboot, voldown and then volup to choose the 3 options but like I said I can't get into the recovery mode properly.
Click to expand...
Click to collapse
Could I ask what steps in rooting you completed successfully and where exactly it went wrong?
Then, what exactly have you done to try to move forward?
Also, which guide did you use?
Don't worry, you're not bricked if you can get to fastboot.
okantomi said:
Could I ask what steps in rooting you completed successfully and where exactly it went wrong?
Then, what exactly have you done to try to move forward?
Also, which guide did you use?
Don't worry, you're not bricked if you can get to fastboot.
Click to expand...
Click to collapse
Last night I followed this videolinked in http://www.youtube.com/watch?v=OYc1lVWm7ks to Unlock OEM my device
I think that worked fine because it didn't throw up any hiccups.
I then followed this http://forum.xda-developers.com/showthread.php?t=1242241 to root it. It didn't have superuser so I downloaded it and installed it and then tried Terminal on the "SU" command. Said I did not have 'permissions'
This morning, I then followed this Youtbue link http://www.youtube.com/watch?v=ZsVpY0PDwtQ and after the first reboot of puting the new .img, it failed to reboot. Now I'm stuck on the M screen.
I think I managed to get my computer to pick up the device in adb fastboot because it responds to that. However when I type in adb devices it doesn't pick up anything...
Next after messing around I managed to flash it to the boot.img on this, http://forum.xda-developers.com/showthread.php?t=1049901
It flashed it ( I think) and worked without errors unlike the other flash I tried today, and its still stuck in M screen.
BTW, this is a UK Wifi Zoom.
Little update - I've downloaded and flash this boot: boot_3.1_insecure.zip from http://forum.xda-developers.com/showthread.php?t=1049901 and now boots up. However my Wifi has now disappeared. I'm in the process of doing a factory reset but will this work?
Still no avail - need to get this wifi working again soon. Think I've finally got access to superuser
Schizophonic said:
Little update - I've downloaded and flash this boot: boot_3.1_insecure.zip from http://forum.xda-developers.com/showthread.php?t=1049901 and now boots up. However my Wifi has now disappeared. I'm in the process of doing a factory reset but will this work?
Still no avail - need to get this wifi working again soon. Think I've finally got access to superuser
Click to expand...
Click to collapse
It sounds like you are on the right track. Hang in there, you'll make it!
Do you have access to an Ubuntu OS? when you connect an android device to a PC running Ubuntu it will mount the internal memory to the PC which makes it much easier to browse the partitions. Also, Go ahead and reflash the CWM recovery through Rom manager (if thats available to UK users) so that hopefully youll get a fresh recovery.img to work with. As far as ADB not noticing the xoom, you probably erased the adb drivers, and is the usb cord youre using 100% data transferable type? I about pulled my hair out a few times because adb wouldnt recognize my phone but realised I was using an older micro usb cable that only allowed electrical current for charging, not data transfer capable. You might also be able to find a clean nandroid backup file from a fellow UK xoom owner, that you trust, and see if they dont mind sending you their backed up boot-img and system-img. Just some guesses, but sounds like you got it pretty well figured out
Hello all, after a bit of self taught ADB and etc and understanding the mechanics how to successfully flash a Xoom, I managed to follow another guide from stratch (unlock oem, etc) and flashes it to the US stock 3.2.2 rom. It picked up wifi but couldn't connect for some reason - maybe different frequency?
Anyway since then I've installed one of the custom Roms here Team Tiamat Xoom Rom 2.2.2 and all is well now Got my Xoom back up and running with superaccess.
Thanks for all the info on this forum, great place for resource
Mind you, coming from a background with no experience with ADB, it was a bit mind boggling but I managed to get there in the end. Just a bit of feedback for those authors with the guides - maybe put a little subsection on the basics of how to get things prepared and up and running. This I think will help a lot of people who cannot sit for hours on end to trouble shoot something if it goes wrong. Most of the guides here are very useful and handy but at time I just kept saying to myself "wtf, what, where, huh?"
Schizophonic said:
Hello all, after a bit of self taught ADB and etc and understanding the mechanics how to successfully flash a Xoom, I managed to follow another guide from stratch (unlock oem, etc) and flashes it to the US stock 3.2.2 rom. It picked up wifi but couldn't connect for some reason - maybe different frequency?
Anyway since then I've installed one of the custom Roms here Team Tiamat Xoom Rom 2.2.2 and all is well now Got my Xoom back up and running with superaccess.
Thanks for all the info on this forum, great place for resource
Mind you, coming from a background with no experience with ADB, it was a bit mind boggling but I managed to get there in the end. Just a bit of feedback for those authors with the guides - maybe put a little subsection on the basics of how to get things prepared and up and running. This I think will help a lot of people who cannot sit for hours on end to trouble shoot something if it goes wrong. Most of the guides here are very useful and handy but at time I just kept saying to myself "wtf, what, where, huh?"
Click to expand...
Click to collapse
My guide, which is highlighted in the Xoom Heaven thread has a large section on setting up your adb files etc.
http://forum.xda-developers.com/showthread.php?t=1249798
Rooted 3.2 Xoom FAIL
Hi All,
Not the best way to join the boards but I am in deep....
I have a canadian wifi xoom on 3.2. I followed these instructions (How to root 3.2 on US WiFi & Verizon 3G XOOM! (Windows and Mac)) to root my xoom and was having issues with a wifi error.
I decided to use the Canadian boot.img file and when I rebooted the xoom got stuck on the moto logo and is no longer recognized by my computer.
I have tried resetting through the android recovery (I dont have anything 3rd party installed) but no luck. I am afraid that this thing is a total write off.
Any thoughts? Thanks
Blair

[Q] [SOLVED] Off-brand tablet bricked after "adb reboot bootloader"

Hi,
I have an iRulu (some off-brand Chinese tablet that is also somewhat branded as Allwinner) 9.7" tablet. I was going install a recovery and try to learn how to compile a ROM for it but things went wrong at step one. I hooked it up to my computer (running Arch linux) and got ADB to recognize the device. I typed "adb reboot bootloader" to get into fastboot and see if the bootloader was unlocked, but when it rebooted it just got stuck on the logo screen and was not responsive to fastboot and adb no longer recognized its presence. I haven't been able to find any other examples online of that command bricking a device. As far as I can tell, none of the normal button combinations work to get to recovery or anything like that. It's not really a bootloop because it doesn't restart and try to boot again. It's just frozen and I can't find my way in. I found a forum that said to disconnect the battery for 30 seconds but it's soldered in (I'm comfortable desoldering and resoldering but I'd prefer another solution). Any ideas on how to recover the situation? Thanks in advance!
830hobbes said:
Hi,
I have an iRulu (some off-brand Chinese tablet that is also somewhat branded as Allwinner) 9.7" tablet. I was going install a recovery and try to learn how to compile a ROM for it but things went wrong at step one. I hooked it up to my computer (running Arch linux) and got ADB to recognize the device. I typed "adb reboot bootloader" to get into fastboot and see if the bootloader was unlocked, but when it rebooted it just got stuck on the logo screen and was not responsive to fastboot and adb no longer recognized its presence. I haven't been able to find any other examples online of that command bricking a device. As far as I can tell, none of the normal button combinations work to get to recovery or anything like that. It's not really a bootloop because it doesn't restart and try to boot again. It's just frozen and I can't find my way in. I found a forum that said to disconnect the battery for 30 seconds but it's soldered in (I'm comfortable desoldering and resoldering but I'd prefer another solution). Any ideas on how to recover the situation? Thanks in advance!
Click to expand...
Click to collapse
When you open the back cover, do you see the board number? You can try searching for firmware using the number, and flashing it. Mine was stuck in bootloop for months before i figured it out(i own a ubislate 7c+ edge, a11 firmware worked for me).
Sent from my GT-I9082 using XDA Free mobile app
NoobInToto said:
When you open the back cover, do you see the board number? You can try searching for firmware using the number, and flashing it. Mine was stuck in bootloop for months before i figured it out(i own a ubislate 7c+ edge, a11 firmware worked for me).
Sent from my GT-I9082 using XDA Free mobile app
Click to expand...
Click to collapse
Thanks that's a great idea. Might not solve the problem to know the firmware, but more information is always helpful.
OK, I solved this. Here's what I did:
- Let the tablet die. All the way. After I left it on that stupid boot screen it was stuck on until it died, I left it another week just sitting there.
- Plug in the power connector and the micro usb connector.
- Turn it on once it gets charged enough that it's willing to start.
- Move the USB connector to the USB-to-go (HOST) spot while still connected to your computer. This crashes the device from some kind of voltage protection mechanism.
I'm not sure exactly what happened but after that the device started just fine. I think the voltage protection mechanism might have kicked it out of "boot to bootloader" mode, where I think it was frozen, and into actual boot mode. I wouldn't necessarily recommend this solution since I put the actual hardware of my computer and the tablet at risk, but I figured my laptop was old and my tablet was bricked so there wouldn't be any huge loss.
Anyway, I'm marking this as solved. If anyone has this happen to them and my solution actually works for you, let me know. I'd get a huge kick out of hearing someone else follow my stupidity. Good to have my tablet back!
Sisonke= We are on the same path in my language
i am currently having the same situation RIGHT NOW. Loved messing with ADB and its ....functions... also typed adb reboot-bootloader and guess what i got.. Stuck at the boot face. lol:laugh: but im gonna take our advice, if you say draining the power is the key...well i find no harm in cutting the main battery source for a while and then reconnecting it again. If this procedure doesn't work...I'll have to do it your way. Crossing fingers ..hope it works. email me wen u get this. [email protected]:angel:

Acer Iconia One (B1-770) - How to reset to factory? (no recovery and forgot pin)

Hi All,
Doing a favour for a friend whose son keeps changing his pin on his tablet and has been changing it so often (to keep parents out no doubt) he has forgotten the pin and cannot get into the tablet.
His father doesn't really care to lose what's on the tablet as it's the kids own fault and has asked if I could restore it to factory.
In trying to do so i have encountered a litany of issues which i will describe below:
1. I have tried holding Volume Up + Power - This takes me to a screen that just says something to the effect of "Fastboot mode" and nothing else and it essentially just hangs there until batteries run out or I hit the reset pin.
2. I have tried flashing it over ADB using my laptop but also no luck as the device is "unauthorized" since I can't get in to the device with my laptop connected and hit the "authorize" button that comes up when you connect to an ADB interface.
This also means I cannot root the device and flash a recovery on to it.
3. They did not have a google account so restoring via the google account is also a no-go.
I'm not sure what other options there are but I find it very odd that there is no way to get around this. I do realize it's a form of security, but this is a legitimate scenario where one needs to flash the device and there is no way to do so. In any case, i know this is a hairy topic so just my .02, dont want to have a debate lol
Is there any way for me to reset this device to factory or at least flash some form of android os on this tablet?
Thanks to all who read and especially to those who assist!
Still no luck, any thoughts, anyone?
for the life of me I cannot put this device into recovery mode.... i've tried all combinations of buttons but at most it always goes into safemode.... i don't feel like there is recovery on this device even though that probably doesn't make sense.. i simply cannot get INTO revovery.
Has anyone been successful getting into recovery on this device model?
Have you tried on fastboot mode? fastboot -w

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