yashsingh1/xdaforums huggingface dataset:
[Acer Iconia A500] WishRyder:
Well...I'm out. Managed to get stuck (literally) at "Secure boot: image LNX checksum fail!" (or "Secure boot: image SOS checksum fail!" if I try to boot to recovery). Can't boot into recovery or OS.

Figured I'd be able to ADB my way out of it, but ADB won't recognize device at this point.

First device I've ever bricked, so this is a new experience for me. I'm so used to having HBOOT or RSDLite as a crutch.
[Acer Iconia A500] richardtrip:
@WishRyder: There's an update.zip to try so it should be possible to recover.
[Acer Iconia A500] seraphimserapis:
I don't think he can recover via the update.zip because he doesn't have a recovery currently.

I could recover because I was able to boot into Android, get su and dd my way out ;)

The problem is - we can flash a custom recovery, but we can't boot into it because Acer stores a checksum somewhere (perhaps we can find that part anywhere and change it)
[Acer Iconia A500] anstelios:
Propably the power and/or USB cords could play a role in these combinations..
[Acer Iconia A500] richardtrip:
My bad (did not read alright i think). The check will be in the bootloader probably so that won't be easy to change unless there are devices with unlocked bootloaders (or a leaked rom with an unlocked bootloader).
[Acer Iconia A500] WishRyder:
FYI: neither Acer nor Best Buy hastled me one bit about exchanging my brick for a working one. Acer would have taken two weeks worth of (free) shipping, so I exchanged it on the spot at Best Buy.

Needless to say, I'm done with my experimental development phase on this thing.

Moral of the story: flashing is a dangerous game folks. Be very careful out there.
[Acer Iconia A500] nycbjr:
Agreed, thankfully Best Buy also exchanged mine, however I am delighted to see progress (the menu via home key).

It will probably require a proper "update.zip" via Acer (or their unlocking the bootloader)" and hexediting out the checksum (just thinking out-loud).

Keep up the good work!
[Acer Iconia A500] dc13:
please stay on topic everyone
[Acer Iconia A500] WishRyder:
Another word of warning, I bricked mine trying to flash a different tegra 2 based recovery, so anyone who flashed the Xoom recovery from rom manager got lucky the flash didn't take. I would strongly discourage anyone from trying to flash any recovery that wasn't specifically designed for the Acer (or any for that matter until the checksum can be straightened out).

Not sure how the recovery managed to blast my LNX partition though...
[Acer Iconia A500] sysmai:
I am an extreme android noob so forgive me if I have mixed input. This is my first actual android device, but I have used xdandroid as my primary os since my touch pro. I have dug through quite a few devices and this is the first one I've seen where the sdcard is directly linked to the devices memory. And labled sdcard rather than internal. The sdcard is /mnt/external_sd. Every device I have rooted or used the update.zip was detected on the sdcard. Being that the sdcard is nothing more than a link in the file system that would give Acer the ability to directly control the contents. So if someone knows or finds out how to init the external sdcard as the actual sdcard like it should be. That would open up a lot more options wouldn't it? At least I have never seen an os wipe data from an external device without asking the user.

If everything I just said sounds crazy then it probably is. I am speaking from xdandroid and winmo experience mostly. But in my head if memory is emulating a device then its like a ramdrive. Being only populated after init.

If the theory is flawed please --verbose. I would like to learn more about android APIs
[Acer Iconia A500] ithink2020:
This worked for me, I was able to see the Menu. I successfully did a Factory Reset!!! :D

Now, has anyone tried this after flashing Clockwork!?!?!
[Acer Iconia A500] Slowie911:
i tried and its the same just the standard menu you guys get
[Acer Iconia A500] ithink2020:
Bummer, well, at least it was attempted.
[Acer Iconia A500] seraphimserapis:
I've split the boot.img and this is the kernel:

http://dl.dropbox.com/u/1661232/boot.img-kernel

I've compiled another recovery image - don't think this will work, but if someone wants tro try it (your risk, your brick):

http://dl.dropbox.com/u/1661232/cwm-alpha2.img
[Acer Iconia A500] eled528:
talk to this guy: budadank. in the thread custom recovery? he offers help because he's within his 30 day warranty and dosn't care about bricking
[Acer Iconia A500] huxflux2003:
How did you get the recovery.img and how did you restore it?

Does the fact that this is possible mean that the device is pretty much safe to fiddle around with?
[Acer Iconia A500] seraphimserapis:
I used dd to get my current recovery.img (see first post for which partition to use) and dd to flash it.

I had luck and could boot into "normal" Android to undo my changes but that's no warranty
[Acer Iconia A500] huxflux2003:
Ok, but since you tried to boot your cwm and it failed, how did you gain access to adb?
[Acer Iconia A500] seraphimserapis:
I turned my device off and didn't boot again into recovery?
[Acer Iconia A500] huxflux2003:
Ok, so you only flashed the recovery partition and messed that one. The system was still untouched.

One more thing. Do you have adb access from the stock recovery?

Sorry for the stupid questions!
[Acer Iconia A500] seraphimserapis:
I didn't. Of course you're invited to try that on your own :-)
[Acer Iconia A500] daveid:
APX Mode is the same as here.

Turn it off, hold in the reset switch, hold the power button, bingo. Gotta load the right drivers, off to work soon, maybe try flashing a recovery tomorrow?

Got the right driver installed, who has a modified recovery image to attempt to load up? I haven't used NVFLASH before, so I will have to get that all set up as well.
[Acer Iconia A500] seraphimserapis:
image in first post. can't wait for the results
[Acer Iconia A500] daveid:
I will have to figure out how to use NVFLASH, also I am off to work and won't be home till probably around 3AM at which time it is bedtime, so I can't test anything till tomorrow.
[Acer Iconia A500] life02:
We used NVFlash on the G Tablet whenever it bricked. If we could get it working for the Iconia, we could play around with recovery parts without worrying about bricking.
[Acer Iconia A500] Budadank:
Confirmed that! Nvidia Reboot-Recovery Driver Installs.
[Acer Iconia A500] thor2002ro:
niiiiceeeeeeee :)

APX mode :)
[Acer Iconia A500] daveid:
When I get home from work tomorrow morning I want to see that someone had success in using NVFLASH to get us in the bootloader mode.
[Acer Iconia A500] seraphimserapis:
I hope thor gets this working :) I've gotta sleep now - have to work early tomorrow
[Acer Iconia A500] thor2002ro:
anyone test the nvflash connection?

"nvflash --sync"

should spit some info... nothing dangerous...
[Acer Iconia A500] huxflux2003:
where can i find the nvidia drivers/tools? i am not authorized to download it from nvidias site...
[Acer Iconia A500] daveid:
I grabbed nvflash from modaco, and the drivers were installed from Acer, had to manually point to the nvidia subfolder.
[Acer Iconia A500] eBug:
So this procedure is Windows-centric? Is there any way to do that under Linux?
[Acer Iconia A500] Hogmeister:
not that i know what to do if i were to be succesful, however i did try doing what you wanted...

got nvflash (i suspect i got the wrong one to be honest), installed the drivers, seeing nvidia USB boot recovery yada yada in the device manager.. however when i enter in "nvflash --sync" in a command box i get an error along the lines of..

"Nvflash started

rcm version 0X4

Command send failed (usb write failed)"

I think i may have snagged a slightly older than desirable nvflash since i dont have access to nvidia's developers zone so i just did some google searching haha... just trying to help out since the others were away.

oh! what i thought was weird though was as soon as i got that err from nvflash the device removes itself from my device manager and no matter if i unplug and replug the usb cable in it will not reappear. only way to get it to show back up is to reboot the tab in apx mode.
[Acer Iconia A500] thor2002ro:
no its not...

nvflash linux: http://db.tt/pXy2myn

from what I've read you don't need any apx driver on linux... im still away from my pc so I can only do the research for you guys...

original article here: http://xdaforums.com/showthread.php?t=989320
[Acer Iconia A500] dc13:
http://www.techpowerup.com/downloads/1893f/nvflash_5.100.0.1.zip

thats the latest
[Acer Iconia A500] thor2002ro:
O GOD.... GIVE ME A BREAK... :|

APX is locked just like the Asus Tras....

http://xdaforums.com/showthread.php?t=1032374
[Acer Iconia A500] Hogmeister:
know it seems stupid, but i figured i'd mess around a bit more rebooting the tab. tried mashing just about everything i could, with the orientation lock in both positions..

anyone have anything else a simpleton can try while the professionals are away?
[Acer Iconia A500] seraphimserapis:
If someone wants to really mess around and still has warranty he's invited to test this file:

http://dl.dropbox.com/u/1661232/cwmblob

This may brick your device! You alone are responsible for that.

Backup first:

adb shell
su
dd if=/dev/block/mmcblk0p1 of=/sdcard/recovery.img

Installation:

adb push cwmblob /data/local
adb shell
su
dd if=/data/local/cwmblob of=/dev/block/mmcblk0p1
reboot

If this doesn't work for you (I bet it won't) you should be able to restore your backup via

adb shell
su
dd if=/sdcard/recovery.img of=/dev/block/mmcblk0p1
reboot

The CWMblob was genereated like the Asus Transformer ones.. but I'm note sure how the headers must be changed.
[Acer Iconia A500] Timmmmmay:
I got the exact same results...
[Acer Iconia A500] Iconia:
This is the response i got:

C:\Documents and Settings\Karl\Desktop\NvFlash>nvf

Nvflash started

rcm version 0X4

Command send failed (usb write failed)

C:\Documents and Settings\Karl\Desktop\NvFlash>nvf

Nvflash started

USB device not found

C:\Documents and Settings\Karl\Desktop\NvFlash>
[Acer Iconia A500] eBug:
Were you able to plug a tooth pick into such a small hole?? Or do I need a needle?
[Acer Iconia A500] Iconia:
I used a tooth pick.
[Acer Iconia A500] thor2002ro:
blob tool is here https://github.com/AndroidRoot/BlobTools

the blob header looks pretty generic...

anyone know where we can find the partition table on the transformer?

edit: I dont think mmcblk0p4 on the Transformer is the recovery partition... I think its the cache one because upon restart on the Transformer the tab flashes the blob into the recovery with a progress bar...

other difference is that on the Transformer they cant see the boot and recovery partition , its shielded by the kernel....
[Acer Iconia A500] daveba:
Wouldn't an alternative recovery method be to inject a new gzipped cpio initramfs that executes the cwm recovery in place of /sbin/recovery ? I guess we can pack and unpack the kernel and initramfs from the recovery.img and write that back to the block device, so we can just cpio a new one with cwm and go right ? Or am i being to simplistic ?
[Acer Iconia A500] eBug:
As per this page:

http://androidroot.mobi/asus-eee-pad-transformer-tf101-root-cwm-recovery/

they actually place the cwm image on mmcblk0p4, not sure if this is the piece of info you're asking for. When you say 'cache one' do you mean /cache?
[Acer Iconia A500] seraphimserapis:
you are right - cache is mmcblk0p4 on the acer and i think on the transformer, too. i'll try to verify that..

edit: paul o brien told me that 0p2 is cache

/boot emmc /dev/block/mmcblk0p6

/cache ext4	/dev/block/mmcblk0p2

/data ext4	/dev/block/mmcblk0p7

/recovery emmc /dev/block/mmcblk0p6

/sdcard vfat /dev/block/mmcblk1p1 /dev/block/mmcblk1

/system ext4	/dev/block/mmcblk0p1

this is from the transformer recovery.fstab
[Android Software/Hacking General [Developers Only]] fr3quency:
Is there any MIUI port for the HTC Magic? I've searched all over the internet... and nothing! Is it because the Magic has a 528MHz CPU? If we installed a kernel to overclock it to 710MHz, would it be possible to install it?

Come on community! Support us Magic users! :( ;-;
[Android Software/Hacking General [Developers Only]] snapper.fishes:
Is there a CM7 port for the G1? If not, you are not going to see a MIUI port either.
[Android Software/Hacking General [Developers Only]] fr3quency:
Yes, there is a CM7 port for HTC Magic. ;) So, what is keeping the community from making a MIUI port? I don't comprehend...
[G2 and Desire Z Q&A, Help & Troubleshooting] rumitg2:
so i want to swutch my number over to google voice but every time i try to switch it voice force closes. im running CM 7.02 but its the same on MIUI and Gingervillain

and ideas?
[G2 and Desire Z Q&A, Help & Troubleshooting] Spastic909:
Tried to clear data from settings? Tried to uninstall/reinstall? What have you tried to do for yourself?
[G2 and Desire Z Q&A, Help & Troubleshooting] rumitg2:
Ive tried from a fresh install on multiple roms, cyan gingervillain, stock, miui. No luck
[G2 and Desire Z Q&A, Help & Troubleshooting] pmcqueen:
how are you performing the Google Voice setup?

I've found that I get weird errors/force closes/multiple instances if I don't do it EXACTLY as follows (I'm on CM7.0.2 as well, but it has been like this for me on CM-based builds since day 1):

- open google voice app

- follow setup through google voice

- when it takes you to where you select your voicemail carrier in Call Settings, select Google Voice and WAIT. after 10-20 seconds, it should change your VM number and take you back to the google voice setup to finish.

this may or may not be of use to you, but I had a buddy with a G2 who was having a hell of a time getting Voice to work properly on his CM-based rom (can't remember which one), and it was because after he selected "Google Voice" as the voicemail service, he was exiting the settings and then getting a force close immediately after exiting and every time thereafter when Voice was trying to sync his inbox or anything of the likes.
[G2 and Desire Z Q&A, Help & Troubleshooting] shortlived:
You want to switch your voicemail number right? Not the number for people to call you? If so you should be able to set it up manually by forwarding calls to your gvoice number. Forward calls for voicemail only. I never tried it that way myself but it should work.
[T-Mobile LG G2x] avetny:
This application allows you to make more powerful the using of SD Card. This is changing a parameter in a file system (thus the need of Root access) that manages the size of the cache on the memory card. By default, this value is set to 128 (kb) but it was found that changing this value in 2048 (kb), the performances are optimized, making read-write on our external memory faster. Many thanks to brainmaster, XDA Member that discover this.

Note that if you reboot/turn off your device, you lose the setting that you did, so you can click on the dedicated box to allow this app to set on every boot the value that you choose.

(download from market)
[T-Mobile LG G2x] nonmindo:
I had this setup on my vibrant and it worked great....so i did it to my G2X once i got it and i actually noticed the performance decrease significantly
[Galaxy Tab Q&A, Help & Troubleshooting] sshimomichi:
I have been looking around the internet on how to unlock this tab (both English and Japanese websites) and I have came across this:

http://berorin.blog.shinobi.jp/Entry/1489/

According to this blogger, he unlocked his tablet by doing the following:

1. (本来使えないキャリアのSIMが刺さってる状態で)*7465625*638*#に電話

2. 使いたいSIMのMCC/MNCを入力(SBなら440/20)

3. ControlKeyに97286414

4. Unlock Saccessfull!的なメッセージが出たら再起動

5. 刺してあったSIMが認識される=アンロック完了

Translation

1. (With another carrier's sim card in the tablet) dial *7465625*638*#

2. Enter the sim card's MCC/MNC (For softbank it would be 440/20)

3. Enter 97286414 on the control key blank

4. A message like "Unlock Successful" would appear, and then reboot

5. The sim card's provider will be recognized (on your tablet) = unlock complete

SIMロック限定解除を解く場合。

To solve the limited sim unlock problem:

次に「#7465625*638*CODE#」をコール。

表示されるNetwork LockのEnter Network Lock Control Key欄に「97286414」を入力⇒OKをタップ。するとUnlock Successlyと表示される。

Next, dial #7465625*638*CODE#

The Network Lock screen with a Enter Network Control Key column should appear. Enter 97286414 then press/click ok. Once you do so, a message stating "Unlock success" should appear.

Now, I have the Overcome rom on my tab and tried this. It did not work. However, I am curious if someone with the original stock rom (Docomo) can successfully unlock this.

I do have network lock, network subset lock, SP lock, CP lock, and Data lock off but for some reason I still get the "Enter Network Control Key" message when I boot it up with another sim card.

Further references:

http://jimporterblog.blogspot.com/

http://jimporterblog.blogspot.com/2011/02/galaxy-tabsc-01csim.html

(Japanese)
[Galaxy Tab Q&A, Help & Troubleshooting] aning_019:
Have you tried this one?

http://xdaforums.com/showthread.php?t=843323

- If you use hexedit app, for clearer instruction do the procedure below :

1. Root the Tab, z4root.1.3.0.apk: http://forum.xda-dev...ad.php?t=833953

2. Install Super Manager as your root explorer. Enable root function in settings.

3. Backup /efs folder with Super Manager to your SDcard to be sure.

4. Open a copy of nv_data.bin in a hex editor. I installed HexEditor. Change 00181462 to 00 (note edit point is currently 01. It is the first two digits after seven "ff").

5. Open /efs with Super Manager set to Mount R/W and your modified nv_data.bin in the Root Explorer clipboard.

6. Rename or delete nv_data.bin and nv_data.bin.md5 and paste nv_data.bin (you have the originals in your /efs backup).

7. Power off the tab.

8. Insert new sim carrier.

9. Power on.

*Reference : http://www.thegalaxytabforum.com/index.php?/topic/168-guide-unlocking-samsung-galaxy-tab/

- - - please inform me if this works! :)
[Galaxy Tab Q&A, Help & Troubleshooting] sshimomichi:
This method did work for the Docomo version of the galaxy tab. Many have attempted this and still had the network lock screen popping up.
[Galaxy Tab Q&A, Help & Troubleshooting] zetsurin:
I assume you mean did not work?

I also have a Docomo tab and am moving back to Australia after some time living in Japan and was hoping to unlock my tab. It's disappointing that the SC01C uses a different lock mechanism. I guess one of these little SIM boards that stick to your SIM to fool the device into thinking they are still on a different carrier might be an option. Selling it has become another option for me - I'm really annoyed that Samsung released this thing with all sorts of little arbitrary differences between different reasons creating lots of confusion about which roms can be run. Disappointing.

By the way I returned my SC01C back to stock, but I don't have a Docomo SIM so I have been using it WIFI only. I might see if I have another carrier SIM to try...

EDIT: I might not be much help as it appears my Docomo Tab is actually unlocked already. When I inserted an Australia Vodafone SIM in it accepted it but said 'No Service'. I would have thought it would have told me 'Invalid SIM' or words to that effect. Secondly, I tried the Softbank SIM from my HTC Desire in my Tab and it said 'Not registered on network', rather than warned me about the SIM. Is there any option I need to go to in order to test it further? I used my tab exclusively as a WIFI tab so far...
[Galaxy Tab Q&A, Help & Troubleshooting] aning_019:
@zetsurin,

Have you tried changing the nv_data.bin on the /efs folder?

Rotohammer posted it works on all GSM Galaxy Tab.

Just be sure to back-up your original files, so you can revert it back. :)
[Galaxy Tab Q&A, Help & Troubleshooting] zetsurin:
Success!!

Ok, I decided to try the codes and I am roaming on Softbank with an Australian Vodafone SIM using my SC01C Docomo tab!

Firstly, to summarise everything the following Samsung codes are involved:

*#7465625# = Check the locks

*7465625*638*Code# = Enables Network lock

#7465625*638*Code# = Disables Network lock

The whole 'Code' business confused me. So basically you enter it like this:

Firstly, I entered *7465625*638*#. If I enter '505/03' (Vodafone Aus) and then 97286414 for the control key, I actually get a 'Lock successful' message, and in fact I saw some other Japanese blogs mention this. This is because that's a lock request, rather then unlock request. So I decided to enter the lock check (first code) and it confirmed I have a lock on.

Then I entered #7465625*638*#. It requests the control code only this time. So I then entered 97286414 and bingo I see the 'unlock successful' message and then the lock check confirmed my tab is unlocked.

Finally I selected Softbank for roaming with my SIM and it worked perfectly. I believe this is the correct way to unlock the SC01C we have as it doesn't have the same format nv_data (I've seen several sources say this actually).
[Galaxy Tab Q&A, Help & Troubleshooting] lemmy_0:
thanks!!!

i was able to unlock it.

problem is, im not able to register to either docomo or softbank. i wonder what's wrong since i can do this on my galaxy s.
[Galaxy Tab Q&A, Help & Troubleshooting] dinise:
Thanks Everyone, unlock successful!

Hi Everyone,

thank you so much for the information, this is the easiest way to unlock my docomo galaxy tab, now I can use my t-mobile with the tab, I am super happy... I have been searching for an answer for a week and still cannot find the best way to unlock the docomo galaxy tab (so many people root it and did not work), until I saw this thread, only took me 2 seconds and now it's unlocked.. Thank you guys!
[Galaxy Tab Q&A, Help & Troubleshooting] jubelo:
This really worked..... Thank you so much!!
[Galaxy Tab Q&A, Help & Troubleshooting] giny8i8:
works, but ony until restart

Hi!

This is the first method, that really works with my docomo galaxy tab. Thank you verry much, for the manual!

Unfortunately it only works until I restart the phone. After restart it asks for network lock key again, and I have to do the whole process from the begining.

Is there any way to make this unlock permanent?

(I also tried several other methods, like haxediting, etc,)
[Galaxy Tab Q&A, Help & Troubleshooting] iarapilot:
I have an ATT SGT with Overcome ROM, and just unlocked my TAB with an app I got on the Market called Galaxy Tab Unlock. Worked without a hitch. I had no unlock code or anything from ATT. I have used different SIM's and they all work. Also have data working with non ATT SIM's after putting in the APN's. The app, once installed, is called Galaxy S Unlock, but works with my TAB. Painless!
[Galaxy Tab Q&A, Help & Troubleshooting] ad3qz:
Yes, it worked until i reboot the tab.

no solution for this issue yet?
[Galaxy Tab Q&A, Help & Troubleshooting] droidtwoseven:
Did your procedure here but the tab still can't detect my SIM. But it said its already successfully unlocked.

I'm from Philippines. Hope you can help me here. thank you.
[Galaxy Tab Q&A, Help & Troubleshooting] mmrizmy:
Unlock success

I WAS ABLE TO UNLOCK IT WITH ODIN,

just flashed with JPZ modem, so easy and 100% working,
[Galaxy Tab Q&A, Help & Troubleshooting] reazbuet99:
Thanks. I have just flushed JPZ modem from http://xdaforums.com/showthread.php?t=1069727 and it is unlocked :)
[Galaxy Tab Q&A, Help & Troubleshooting] sirlop:
Yep

Ok
[Thunderbolt Q&A, Help & Troubleshooting] Drew66:
I have a Thunderbolt running BAMF 1.5. I loaded Adrenalin's 4B kearnal and all went well. I went into SETCPU and bumped it up to 1288 and then as soon as I tried Quadrant it crashed and has been in a boot loop. HELP! I have pulled the battery,:eek:
[Thunderbolt Q&A, Help & Troubleshooting] ska.t73:
Reboot into recovery and restore your back up.
[Thunderbolt Q&A, Help & Troubleshooting] Drew66:
I was able to get into SETCPU by going very slowly through boot screen, etc. I have it stable but I am switching to 4C... Thanks!
[Thunderbolt Q&A, Help & Troubleshooting] skeet43169:
i had the same problem and someone told me o use kernel manager and it worked just fine for me and there is a lot of kernels to choose from
[Thunderbolt Q&A, Help & Troubleshooting] burntorangefan:
Good news...glad you got it working!