Some bootloaders are locked by the manufactures to prevent the phones from booting unofficial firmware images.

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26
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2answers
13k 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 ...
24
votes
1answer
19k views

What's the security implication of having an unlocked boot loader?

Nexus devices can be unlocked using the fastboot command fastboot oem unlock to install a custom firmware. For security reasons, the phone is wiped when this command is executed. However after this is ...
12
votes
4answers
37k views

What does “fastboot oem lock” do?

I've had my phone for months, loading with several firmware, ROMs and OTAs, without ever running this command. What does it do? What I know is that "fastboot oem unlock" displays the confirmation ...
7
votes
1answer
11k 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
3answers
32k views

How to re-lock Android bootloader?

I've unlocked my Nexus 5 by using CF-Auto-Root. I want to undo my actions and return the device to its original state: unrooted and locked. How can I do this?
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
14k 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 ...
4
votes
3answers
10k views

unlocked device vs. unlocked bootloader

I've always thought that if a device is unlocked it means that it works with different carriers. If the device bootloader is unlocked, then does this mean the device will automatically work with ...
4
votes
2answers
33k views

Problem unlocking HTC phone using their fastboot program

According to HTC, my Amaze 4G is fully ready from the factory to be queried for its identifier tolken, but when I run the appropriate command, it doesn't work. I get: $ fastboot oem ...
4
votes
1answer
3k 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
2answers
32k views

Unlock bootloader using fastboot using Ubuntu/Linux

I am trying to unlock bootloader for my HTC Legend. I have ADT (Android SDK according to release 21.1) on my Ubuntu/Linux box. While following the HTCDev instructions to unlock bootloader of HTC ...
3
votes
1answer
510 views

Does the bootloader need to be unlocked to flash my phone

I am not able to relate between bootloader unlocking and flashing. From what I understand, when I flash my phone with a custom ROM, it writes to the /boot partition and hence the bootloader has to be ...
3
votes
1answer
2k views

What exactly gets wiped when unlocking Galaxy Nexus?

I've seen a few guides on how to unlock the Galaxy Nexus to prepare it for rooting, and they say that the fastboot oem unlock command will "wipe your personal data". I'm a little unclear on what gets ...
3
votes
1answer
1k views

Does Unlocking bootloader affect network lock?

Will the bootloader unlock procedure as shown on the HTC Dev website affect my network lock? I have an HTC Aria, which was originally SIM locked, but I got unlocked from a shop. Now, since I'm ...
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
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
2answers
7k views

Nexus 7 Error: Failed to mount /cache

I had a problem with my Nexus 7 (2013, 2nd gen) tablet. I restarted my tablet and when it was rebooting again, it showed "Google" logo and then stood there. I wait it (around 20 minutes) but it did ...
2
votes
2answers
801 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
483 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
549 views

Does Sony always check if the bootloader has been unlocked when repairing the phone?

I'd like to unlock my Xperia Neo V's bootloader, but on the other hand I don't want to lose my warranty. Obviously, that isn't possible. So my question is: Do Sony Ericsson's repair centres always ...
2
votes
0answers
388 views

Unlocking bootloader on Sony Ericsson NEO V

Has anybody managed to use Fastboot on Ubuntu to unlock the Sony Ericsson Neo V? I tried and got the blue led light (bootloader) while connecting the USB. But Fastboot still doesn't recognize the ...
1
vote
3answers
5k views

Will a Factory Reset lock my phone (Samsung Galaxy S2) if it is unlocked, but factory locked?

I know that formatting the SD card will not lock my phone again. But if I Factory Reset my phone, will it re-lock the phone or not?
1
vote
2answers
5k views

Unlock Xperia Play R800i for use with CM9

Is there any way I can unlock the bootloader for my O2 Xperia Play so I can install Cyanogen Mod on it? Sony announced today that they will not be releasing ICS for the Xperia Play. Now I want to ...
1
vote
2answers
28k views

Can I flash CyanogenMod without unlocking bootloader?

With a locked bootloader on an SE ST17i running the rooted Stock Xperia Gingerbread 2.3.4, can I flash the CyanogenMod 9 onto it? Or do I really need my bootloader unlocked? I also have ClockWorkMod ...
1
vote
1answer
3k views

Can I fastboot flash a factory image without flashing the recovery?

Factory Images Using Nexus 9 as an example, the flash-all.bat contains: fastboot flash bootloader bootloader-flounder-3.43.0.0114.img fastboot reboot-bootloader ping -n 5 127.0.0.1 >nul fastboot ...
1
vote
1answer
1k views

Unlocking Bootloader of HTC One X on Windows 8.1 / Linux Ubuntu

How to unlock the bootloader of HTC One X on Windows 8.1? Since I want to install MIUI Rom. When I install the latest version of "HTC Sync Manager", It shows me that the Windows 8.1 is not competible ...
1
vote
5answers
2k views

Is it possible to enable bootloader unlocking on C6603 (Yuga/Sony Xperia Z)?

I was following Sony's official guide for unlocking the bootloader. However, upon entering *#*#7378423#*#* into the phone App and navigating to Service Info -> Configuration under the Rooting ...
1
vote
1answer
1k views

Unlocking the Bootloader on a Nexus One with S-On

I'm interested in rooting my (Very recently bought) nexus one, and installing Cyanogenmod over Fastboot. However, on the boot screen of my device I've noticed the first line tells me that security is ...
1
vote
1answer
27k views

How to unlock bootloader on samsung devices?

Before you try to install any custom ROM on your device, you need to unlock the phone’s bootloader, which is a code executed before any OS (operating system) launch. The notion of a bootloader is ...
1
vote
1answer
2k views

Installing Android 4.1 or higher on Sony Tipo with permanently locked bootloader

My operator (Telecom HU) has disabled unlocking the bootloader of my Sony Tipo. I would like to get Android 4.1 or higher on my device, but so far this seems impossible. I successfully installed ...
1
vote
0answers
51 views

How can I unlock bootloader of LG Vortex (VS660)

I'm trying to flash CyanogenMod to an old LG Vortex. I believe the first step is to unlock the bootloader. (I have successfully done this to a Nexus 7). I have adb and fastboot installed on LM17. Most ...
1
vote
1answer
59 views

Nexus 4 screen got hung until battery drained and on restart stuck on flying dots

I have nexus 4 with lollypop installed on it. Yesterday while operating its screen just went to hung state and stopped responding. I could not even power off the phone. Therefore, I let the phone to ...
1
vote
2answers
852 views

How to do a factory reset when recovery mode, usb debugging and factory reset don't work?

I have a device called "EXEQ SET": http://www.exeq.ru/produkcija/pristavki/os-android/set.html It runs Android 4.1.1. It is spitting out errors like this every other second, making the device almost ...
1
vote
1answer
448 views

Bricked phone due to cut-pasting of apk files

I accidentally cut all the .apk and .odex files from /system/apps/ and pasted onto the SD card instead of copying and pasting them. My phone is totally bricked. Stuck in a boot-loop and factory reset ...
1
vote
0answers
1k views

How do I root a Samsung Galaxy S4 SGH-I337?

I have a Samsung Galaxy S4 SGH-I337 with a I337UCUAMF3 baseband. How do I either root it and unlock the bootloader or install a mod? Alternately, can I change it back to a previous baseband and unlock ...
1
vote
1answer
254 views

Incompatible / error connecting as MTP device after unlocking and rooting Nexus 4

I unlocked and rooted my Nexus 4 it shows as connected it shows in my computer But when copying a file, it gives me an error stating "device is unavailable or may have been removed" What should I ...
1
vote
0answers
46 views

Locked out of htc wildfire, need to get some messages of the phone, pretty much at the end of the line [duplicate]

My HTC Wildfire got passcode locked (too many tries), and the Google account isn't working. I need to get some important messages off of it. I don't know much about behind the scenes stuff but I know ...
1
vote
0answers
426 views

How to unlock the bootloader on Verizon Galaxy S3 without phone service

How can I unlock the bootloader without any phone service? Do I have to take out the Verizon SIM to do this? The phone is already rooted and has the super user app. A website said it's possible to use ...
1
vote
0answers
456 views

security implications of unlocking, rooting, cutom recovery, etc [closed]

Just curious. There are lots of posts on the web that talk about the fact that unlocking your bootloader wipes apps and data - presumably to prevent unauthorized access to that info. But in order to ...
1
vote
0answers
346 views

How do I unlock my bootloader with Omnius?

I want to unlock the bootloader of my Carrier Locked O2-UK Xperia Play. When I go into the service menu and check if my bootloader can be unlocked it says "allowed:no". After further research I found ...
0
votes
1answer
920 views

How to install Android to any phone very first time?

I know this sounds weird one. But I have a Motorola Photon 4g which has got corrupted or some unstable ROM. I am facing 15-20 blackouts and restarts. This led to think like that. I want to know the ...
0
votes
1answer
179 views

Can I use my bootloader-locked phone with a different network?

I just bought an Xperia Z and the bootloader is locked. Do I need to unlock it in order to run it on a new SIM card and can I switch to Virgin? It's OK if I can't: I will just buy a Bell SIM for $10, ...
0
votes
1answer
355 views

HTC rhyme shows LOCKED when I turn it on

When I turn my HTC Rhyme phone, it just shows A page that's written ***LOCKED*** at the top and has three android icons at the bottom and have some menu items as below: Bootloader Reboot ...
0
votes
1answer
654 views

How to install ROM when bootloader is not unlocked?

Accidentally, on stock recovery, I selected wipe data/factory reset which could have uninstalled the ROM on it. So, now my mobile is showing company logo only. My mobile HTC Inspire A9192's ...
0
votes
1answer
204 views

Atrix 4G update via OTA with unlocked bootloader?

I am running 4.5.91 currently on a rooted and unlocked Atrix. Will I brick my phone by updating to 4.5.141 from OTA source? Can I re-lock the boot-loader if that is the issue?
0
votes
0answers
6 views

Relock Y300 Bootloader

I have hauwei Y300-0100. I unlocked Bootloader Of My phone before for root it. Now i want to flash my phone with stock rom but i cant. I tried to lock my phone with fastboot but i gave an error: I ...
0
votes
1answer
21 views

Should I re-lock bootloader after flashing developer preview on nexus 5?

I have flashed the Android M developer preview 3 on my Nexus 5 phone, for which I was required to unlock the bootloader. Now that the flashing has completed successfully, should I re-lock my ...
0
votes
0answers
16 views

Unlocking Bootloader on Motorola ET1

I would like to unlock the bootloader on my Motorola ET1, but I have a problem: once I restart the device in the bootloader, it is not recognized by my computer (fastboot devices doesn't detect it) ...
0
votes
1answer
89 views

How to set up BIOS-like password on Android device? [duplicate]

Setting a screen lock password or SIM pin or both is fine for securing some aspects of your mobile device. But what if, as a nasty joke, someone manages to grab a hold of your device and hits the ...
0
votes
0answers
65 views

Unlock Bootloader on RCA tablet

There is many phones out there that can have their bootloaders unlocked. I'm wondering if you can unlock the bootloader on a rca tablet. Any help will be appreciated!