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

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6
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3answers
63k 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
2answers
2k views

How to re-unlock bootloader for OnePlus One

I have OnePlus One with CyanogenMod 12 from factory and I decided to update to CM 13 (nightly build). To achieve this I did the following from OSX: Unlock the bootloader (fastboot oem unlock) Boot ...
5
votes
1answer
16k 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 ...
0
votes
0answers
7 views

Unlocking bootloader SGS6 [duplicate]

i have a problem with my Samsung Galaxy S6 (SM-G920F) bootloader, it's locked (I'm not 100% sure, a guy from xda told me international version comes with and unlocked bootloader) , i got android ...
1
vote
0answers
27 views

Volume Up button does not respond while unlocking bootloader

I have an InFocus M260 (MediaTek MT6582 based). It has a locked bootloader and whenever i try to unlock the bootloader, this shows up : fastboot -i 0x0489 oem unlock in the device it shows ...
0
votes
0answers
24 views

Bootloader menu not starting

boda impressped E351 DC with andoid 4.2.2 but I want to install another os and for that I need to unlock the bootloader but when I try to open it with the adb (adb reboot bootloader) the device ...
6
votes
2answers
12k 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 ...
0
votes
0answers
91 views

HTC DESIRE 310 - unlock bootloader problem can't fastboot oem get_identifier_token

The devices is connect on screen my HTC Desire 310 I have: On computer in cmd fastboot can see device but fastboot oem get_identifier_token not work : and nothing more What is wrong? Please ...
1
vote
0answers
94 views

Nexus 9, no recovery, no USB debugging, OEM locked in Settings

I've got a pretty complex problem. At the moment: Nexus 9 WiFi Tablet, USB Debugging not enabled Normal Startup: Android laying on the floor Startup with Power+Volume Down: Fastboot Bootloader ...
0
votes
1answer
48 views

Note 4 verizon with an unlocked boot loader boot loop

I just managed to get my Note 4's bootloader unlocked and installed TWRP, but I didn't take a backup before flashing SuperSU and, as luck would have it, got into a bootloop. I have tried factory ...
0
votes
0answers
136 views

Is rooting the Samsung Galaxy S5 G900V impossible?

I've been trying to root my Verizon S5 (SM G900V) for a while now, but to no avail. It has Android 5.0 lollipop on it right now. I was able to easily root my S4, but nothing seems to work for the S5. ...
0
votes
2answers
76 views

What do the terms root, bootloader unlock, custom recovery and ROM installation mean? [duplicate]

I'm trying to root my Galaxy Note 4 and I see the above terms being used everywhere. What do each of them mean? I have a vague idea about each of them, but I'm still confused about some of them. A ...
0
votes
1answer
142 views

Fastboot saying “Unsupported command”

Hey guys i just rooted my Motorola Droid RAZR (HD) with kingroot and i want to install CM 12.1 nightly. Before i proceed, i need to unlock my bootloader. After sitting infront of PC for 3-5 hours now, ...
1
vote
0answers
48 views

Sony Xperia SP model not listed in 'developer.sonymobile.com/unlockbootloader' for bootloader unlocking

I don't know how I can unlock my Xperia SP phone, because the model is not listed in the site http://developer.sonymobile.com/unlockbootloader so I couldn't continue. My logic says there might be some ...
1
vote
2answers
32k 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

How to install Nexus 6 / 5X / 6P Drivers in Windows 7 properly where fastboot can see it?

I have the Nexus 5X drivers installed properly on Win7 64bit and it shows up in my device manager as Nexus 5x. I can verify that it gets detected as I see it in chrome inspect page. But when i try to ...
1
vote
1answer
141 views

Does “fastboot oem lock” prompt to confirm?

I want to run fastboot oem lock (or fastboot flashing lock) on my Oppo Find 7 to see if I can reproduce the behavior in this post. However, I don't actually want to go through with the bootloader ...
2
votes
1answer
443 views

Oppo find 7: bootloader re-lock impossible?

I tried to relock the bootloader on my Find 7 (which I'm pretty sure was unlocked since I installed a custom rom). fastboot oem lock ... After that nothing. Windows console is "stuck". Any clue?
1
vote
0answers
35 views

How can I find out if the Bootloader is locked or not? [duplicate]

Is there a direct way to find out if the bootloader on a new unrooted device is currently locked or not? I would like to do this without the risk of clearing or bricking the device. I am looking for ...
3
votes
1answer
123 views

Moto E (1st Gen) Bootloader Unlocking

There was some problem with my 1-yr-old Moto E 1st gen. It got dead and after some time the dead android guy appears with some red-blue thing on its chest. It appears for half a second. I pressed ...
15
votes
4answers
53k 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 ...
0
votes
0answers
168 views

Error unlocking HTC 626s bootloader?

I have a HTC Desire 626s purchased from virgin mobile and I wish to unlock my bootloader and root the device. So I have been following the HTCDev bootloader unlocking instructions. But whenever I ...
1
vote
1answer
3k views

How to check if bootloader is unlocked mediatek device

My Device: Rooted Karbonn A52+ Android 4.2.2 (Stock ROM) | MTK6572 CPU Hi friends, I was recently able to flash Clockwork Mod Custom Recovery followed by a Custom ROM flash from the recovery (though ...
0
votes
0answers
142 views

How to enable Android Marshmallow multiwindow without unlocking or ROOT

I upgraded my Nexus 9 to Android 6 and I want to enable the multitasking feature. But it requires unlocking the bootloader. I have the latest updates installed and I am using stock ROM. Enabling ...
-1
votes
1answer
185 views

Cannot unlock bootloader of my OnePlus 2 with oem unlock

I want to flash my OnePlus 2, as it's stuck on the boot logo. For this, I first need to unlock the bootloader, but I can't: the adb command tells me I have to check "oem unlock" in the phone settings. ...
1
vote
1answer
642 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 ...
5
votes
1answer
186 views

Android Nexus 6 Bricked? TeamWin splash screen turns on and off

I think I've bricked my Nexus 6. Every time I turn it on, the teamwin (TWRP) splash screen keeps literally flashing on and off. I would be able to flash a stock system on but I can't due to the fact ...
0
votes
0answers
127 views

HTC One mini HTCdev Unlock Bootloader won't unlock in the last step

After not using my HTC One mini for quite a while, I now want to use it again. However when I turn it on, it shows a locked bootloader. So I singed up on HTCdev to unlock it and went through every ...
0
votes
1answer
386 views

Backup/flash system and data without unlocking bootloader?

I was wondering if I can make a full backup of my system partition via fastboot or adb and re-apply the backup to a different phone of the exact same model? Or is this only possible if the bootloader ...
2
votes
0answers
249 views

Any chance to unbrick relocked HTC One M7 with S-on and a old copy of the RUU.zip

Background After 1 year of use, the most recent OTA to my HTC One rendered several key features, including the notification bar and the home and back buttons, unusable , effectively soft-bricking ...
3
votes
1answer
59k 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 ...
0
votes
0answers
38 views

Unlock bootloader on cm12

I'm now having a Samsung Galaxy Superior (GT-I9260) running on cm12.1 downloaded from the cm website. I want to flash it to kali linux now, and it tells me to unlock the bootloader first. After doing ...
0
votes
0answers
18 views

Unsuccessful unlock prevents data wipe

My phone is in a difficult state right now: Can't boot normally (tries to complete unlock). Can't make use of adb (because it is not fully unlocked or locked yet). All I can seemingly get to is the ...
2
votes
2answers
830 views

Can JFLTE Lollipop ROM be installed on the Verizon Galaxy S4 SCH-i545 with ME7 baseband?

I have a rooted Verizon Galaxy S4 SCH-i545 (edit: NOT GT-i9505) updated to the ME7 baseband version. I would like to upgrade to this Lollipop ROM, which appears to be designed for the GT-i9505, but I ...
1
vote
2answers
3k 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 ...
5
votes
1answer
181 views

Why does unlocking bootloader affect camera quality on some devices?

Sony announced it officially that unlocking bootloader, since it will remove DRM keys, might affect camera quality. For high-end devices running recent software versions, for instance Xperia Z3, ...
0
votes
1answer
78 views

Willl unlocking my Bootloader delete my OS

I have decided to install Cyanogen Mod Android 5.1.1 onto my Xperia SP[C5302]. I am about to unlock the bootloader(the first step). I have followed the steps and downloaded Android SDK(downloaded ...
5
votes
2answers
39k 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 ...
0
votes
1answer
131 views

What can happen when you flash a bootlocked device?

This will probably not be done in practice, but I like hypotheticals. I believe that when you flash a custom recovery on a bootlocked device the stock recovery will just be flashed back on reboot. ...
5
votes
3answers
15k 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 ...
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
votes
1answer
526 views

How to unlock the bootloader of Samsung Galaxy Ace3

Please i have been searching the whole internet, but can't get the answer to my question. How can I unluck the the bootloader of my Samsung Galaxy Ace3 Duos. Please any help will be appreciated. ...
0
votes
0answers
503 views

How to unlock bootloader in HTC Desire 816G

I have downloaded the CM12 for my mobile and i want to unlock the bootloader in my device to flash it.. I tried the HTC DEV and it didnt work.(couldnt get the token pass from device with cmd) Can ...
0
votes
0answers
44 views

How to use a Motorola Titanium without a sim card?

I have received (years ago...) from a customer a Motorola Titanium (with a screen reporting that it comes from Avantel) and I recently removed the sim card that was in it. I realize now that the ...
28
votes
1answer
24k 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 ...
0
votes
0answers
727 views

Unlock Galaxy S5 - freez at: downloading do not turn off target

Before everything I request do not link to irrelevant questions such as this. What I want to do: I want to install Ubuntu Touch on samsung galaxy S5. I use ubuntu on my laptop. What I have done: I ...
1
vote
1answer
428 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
259 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
91 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
2k 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 ...