The bootloader is started shortly after the device's basic checks and is responsible for loading the Android OS. It can be used to boot different rooms besides the stock firmware, if the bootloader is unlocked.

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20
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2answers
8k views

Why does unlocking the bootloader wipe phone?

I understand that unlocking the bootloader will wipe my Android phone, but have been looking around for why. Seems to be by design, but what is the reasoning for that design? Is it some security ...
14
votes
2answers
14k views

Do custom ROMs like CyanogenMod modify your bootloader?

Does a custom ROM like CyanogenMod come with their own bootloader or does it just overwrite the /boot kernel and /system? Does the bootloader take responsibility to lock your SIM card on a carrier? ...
13
votes
4answers
389 views

Is it possible to get multi-user support on Android with help from the boot manager?

I know that a common problem with Android tablets is that they lack multi-user support. I wonder if there isn't already a solution that allows me to select the user on boot by linking/moving/changing ...
8
votes
2answers
47k views

What does it mean to “brick” your phone?

I'm considering unlocking the bootloader on my Verizon Galaxy S3 (SCH-I535). However, a guide I was reading made this statement: Once you have unlocked your phone’s bootloader using this app, you ...
8
votes
1answer
498 views

What happens to the battery during bootloader/recovery?

I want to know what happens to the battery (does it charge/discharge/stay constant?) when the device is in bootloader or recovery mode. In both of these modes, a USB may or may not be connected. If ...
6
votes
5answers
12k views

ADB can discover devices but not fastboot

I've searched on the web about this problem and it's usually solved by installing the appropriate drivers. Problem is I'm on a Mac. When I plug in my device, it can be discovered when I run adb ...
6
votes
1answer
926 views

Android Jelly Bean 4.1.1 on Galaxy Nexus showing droid

I've been testing the Galaxy Nexus with JB 4.1.1 and this is what happened yesterday. Has anyone seen this screen?
6
votes
3answers
2k views

Strange (unfamilar screen) on my Galaxy Tab?

I have a Galaxy Tab 10.1. It was powered off and charging when my nephew picked it up and turned in on. When he handed it to me on the screen was a graphic of an open box, the android logo with the ...
6
votes
1answer
439 views

What is the difference between aboot and boot?

I'm looking through my device and I noticed within /dev/block/platform/msm_sdcc.1/by-name that there is boot and aboot partitions. What is the difference between them? Mainly what is aboot?
6
votes
1answer
9k views

fastboot not working on my Nexus 4

I'm trying to root my N4, and fastboot doesn't seem to work. Running it on linux, and the fastboot binary seems to run. 'Fastboot devices' produces info on my device, but 'fastboot oem unlock' just ...
5
votes
1answer
5k views

How does the typical Android boot process work? [duplicate]

Possible Duplicate: Can somebody explain the boot process of an Android device? Windows follow some specific way to boot: Start System > BIOS > Load Boot loader > Load WIN Kernel > Load WIN ...
5
votes
1answer
4k views

Can I lock the Nexus 4/7 bootloader after flashing a non-stock ROM?

I know that doing a fastboot oem unlock will both unlock the bootloader and wipe the data on the device. Unfortunately, while this allows me to install a non-stock ROM like Cyanogenmod, my ...
5
votes
1answer
6k views

what is a bootloader unlocked phone?

What is a bootloader unlocked phone? How we can make use of it while creating or flashing ROMs? What are advantages of unlocked bootloaders over locked bootloaders? Why does not any OEM generally ...
5
votes
1answer
11k views

Problem with unlocking the HTC Wildfire bootloader with HTC unlocker

I tried to unlock HTC bootloader by the official tool but I get to the stage when I issue the command: fastboot oem get_identifier_token Unfortunatly I get error ... (bootloader) [ERR] Command ...
5
votes
1answer
1k views

How can I unlock the boot loader on a HTC Magic?

After a lot of unsuccessful days trying to root my Android phone, I'll now post my problem here with every approach I already did. Maybe someone can help me. I am trying to unlock the boot loader on a ...
4
votes
2answers
6k views

Is there currently an easy way to root Sony Xperia S with stock ICS 4.0.4 ROM?

I'm looking for an easy way, which doesn't need Unlocking bootloader or flashing Roms, just like root solution for SE 2011 devices (one click). It's because I currently use my Xperia S for development ...
4
votes
2answers
310 views

How is it that Rooting is always possible?

Having spent some time researching what actually goes behind rooting an Android phone, the main reason that leads to the ability root is an inherent vulnerability on the Linux kernel that leads to the ...
4
votes
1answer
6k views

What is S-OFF? Why would I want to do it?

I always root my android devices, but there's something called obtaining S-OFF for certain devices, and I have no idea what that means. What exactly does the term S-OFF relate to? Why would I want ...
4
votes
1answer
309 views

How do I unlock the bootloader on the Samsung Galaxy Nexus?

I have a LTE (Verizon) Samsung Galaxy Nexus. How do I go about unlocking the bootloader such that I can root the device?
4
votes
1answer
2k views

Does the Samsung Galaxy S II come with an unlocked bootloader?

Does the Samsung Galaxy S II come with an unlocked bootloader as earlier promised by Samsung?
4
votes
1answer
1k views

How can I stop the bootloader unlock process?

My 4 year old turned on my phone (Nexus S, 2.3.4 I think) while pressing the volume button. Apparently, this triggers the bootloader unlock process, which I don't want. The phone is now stuck on the ...
3
votes
1answer
10k views

Is it possible to boot an Android phone from a USB drive?

Is there any way to boot an Android phone* from a bus-powered USB drive**? If so, what are the steps to achieve this? * E.g. one with USB OTG functionality. ** E.g. a flash drive.
3
votes
1answer
10k views

What does HBOOT mean?

My best guess as of now is "partition and mount point layout". But it feels like there's more to it, since the bootloader can identify the HBOOT by name. I've been flashing custom ROMs for quite a ...
3
votes
2answers
4k views

Alternative ways to factory reset?

My Android 2.3 system my PMP3384 tablet somehow crashed so seriously that I cannot even do a factory hard reset, because I cannot get to settings, only the following message appears again and again: ...
3
votes
1answer
287 views

remove apps with htc bootloader unlocked

Will just unlocking the bootloader per HTC website allow me to remove apps like Blockbuster, Nova, etc on an EVO 4G?
3
votes
2answers
11k views

How to know whether my Xperia Ray's bootloader is locked or unlocked one

Title says all, but again a bit background I would like to know whether the bootloader on my xperia ray is locked or unlocked one. I bought it from ebay & with seller warranty (or you can say no ...
3
votes
1answer
34k views

How to and from where install ClockworkMod Recovery (CWM) on GT-P1000?

Currently I am trying to upgrade my Android OS from 2.3.3 to Cyanogenmod 9 not with "Odin" but via the bootloader and SD-card. Now I had a problem with "Signature verification failed" described here ...
3
votes
2answers
1k views

How to unlock Nexus S 2.3.3 bootloader without having to wipe all device data?

The usual way is to execute: fastboot oem unlock But this will erase all my private data.
3
votes
2answers
10k views

How Can I Pass Bootloader (Huawei Y200 stuck logo/ Boot-Loop)

I have recently learnt a few things about Android and its system. I have a Huawei Ascend Y200, and I flashed it with ClockworkMod specifically for Y200 with a computer and it worked. I rooted my ...
3
votes
2answers
6k views

Device always boots in recovery mode, but apparently there is no recovery partition

We have a BSNL Penta IS709c (cheapest tablet currently available / Oct 2012) running Android 4.0. Feeling adventurous, I issued reboot recovery through adb and the device tried to reboot in recovery ...
3
votes
1answer
2k views

Xperia play bootloader locked?

Hi guys i've been trying for quite a while to unlock the bootloader of the phone i've bought. It's from hong kong and branded to vodafone it's not sim locked as I tried an optus sim and it worked. I ...
3
votes
0answers
71 views

Is there a way to tell if a boot loader can be unlocked before purchase?

For example are boot loaders unlockable only if the phone is branded and comes with a contract? If I bought a phone of Amazon.com would I likely be able to unlock the boot loader or is it really just ...
2
votes
1answer
4k views

Where is the code for the Bootloader stored in an Android phone?

Where is the bootloader program on an Android phone stored ?
2
votes
3answers
2k views

how to add a custom lock for the recovery and/or bootloader?

Unlocking the bootloader and/or the recovery is very popular discussion across many devices. But doing so exposes a very obvious and inevitable issue with security! An unlocked recovery means that no ...
2
votes
2answers
672 views

Will bootloader unlocking provide access to all the apps in the Play Store?

My flyer doesn't allow few apps to be installed from the Play Store as it shows "This app is not compatible with your device" and this incompatibility is not due to OS. If I get the apk of this app ...
2
votes
1answer
2k views

Possible to do Nandroid Backup BEFORE unlocking bootloader?

I have a stock Atrix 4G with Froyo (2.2.2) (Version.4.1.83.MB860.ATT.en.US). It's past warranty, so I'm not worried about voiding the warranty. As one would expect, the stock recovery doesn't offer ...
2
votes
1answer
1k views

What does unlocking the bootloader do?

My understanding is that a boot loader is like a BIOS in a PC, which will help a device to load the OS correctly. When I unlock the bootloader in an Android device, does this modify the complete ...
2
votes
1answer
740 views

Does a nandroid backup contain the hboot?

If I restore a nandroid backup will it restore the hboot and the corresponding partition tables? I'm on bravo-stock hboot now and I want to try the CM7 hboot. Will I be able to switch back to stock ...
2
votes
1answer
376 views

Xperia V can I relock my bootloader for Bravia Engine to work again?

I have unlocked the bootloader to try some roms, but too late I understand that this will make the Bravia Engine to stop working... If I relock my bootloader will that make the Bravia Engine to work ...
2
votes
1answer
13k views

Upgrading hboot fails: signature verify fail

My Goal http://forum.xda-developers.com/showthread.php?t=1762790 Putting jelly bean on nexus one My Problem Upgrading hboot I'm just following everything step by step (link) $ fastboot flash ...
2
votes
5answers
6k views

Nexus 10 stuck in bootloop after Lollipop flash no ADB and no Fastboot

So .... I flashed the mantaray-lrx21p image from Nexus Factory Images on my Nexus 10 (16GB Wifi) and it's stuck in a bootloop. No problem, I thought, I can get into fastboot and fix it, right? Maybe ...
2
votes
1answer
207 views

Does upgrading bootloader wipe your data?

I'm about to flash an update to Android 4.4.2 on my Nexus 4, downloaded from Google Developers, and one of the files that it's going to flash is the new bootloader version. I wanted to know if ...
2
votes
1answer
1k views

How can I go back to ICS after JB OTA updates?

My phone is HTC One S VelliC2 and received the JB OTA updates. However, I could not get used to it. So how can I return to ICS? Can I use the HTC Android 4.03 RUU file? Now the Hboot version has ...
2
votes
1answer
3k views

Android tablet won't reboot after rebooting using volume and power buttons

I am using a 7" Smartfren tablet called S7. I was following this tutorial. When I got the last part about the bootloader, I turned my device off. I tried to reboot using the volume buttons and power ...
2
votes
1answer
1k views

Root hboot 2.18.0001 without computer (HTC EVO 4G)

My EVO 4G's charging port is broken and I am trying to gain root access on my device. Is there anyway to do so without using the USB port to connect to the computer?
2
votes
1answer
12k views

Galaxy s2 will not boot, wrong bootloader

My Samsung Galaxy S2 GT-I1900 won't boot. I tried to update to ICS with Kies which crashed, wherefore I unplugged the USB to start over. Now my phone had no OS, and wouldn't respond to Kies anymore. ...
2
votes
0answers
69 views

Nexus 7 2013 crashes when in boot loader. How do I flash a new image to it?

I have a Nexus 7 2013 which I'm trying to flash the Android Lollipop preview image to. It's currently running the last Android L preview image. Whenever I boot the device to the bootloader screen ...
2
votes
0answers
1k views

Installing Android using only fastboot on HTC Vision

I lost my system somehow. My phone turned off and reboots during starting up. I'm only able to go to hboot (fastboot/recovery etc.) on my phone, and I'm unable to run Android system. I have tried ...
1
vote
1answer
6k views

What exactly are DRM keys?

I was thinking of unlocking my ST17i's bootloader but I saw on the Sony Mobile website that unlocking the bootloader will result to the deletion of DRM keys from my phone. What exactly are they? And ...
1
vote
1answer
4k views

How do I unlock the bootloader on my Sony Ericsson Xperia mini pro?

I own a "Sony Ericcson Xperia Mini Pro" (model number SK17i) running Android 2.3.3 (Kernel 2.6.32.8-perf, build number 4.0.A.2.335). It's branded by Orange Austria. I'm looking for a way to root it, ...