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

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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 ...
5
votes
1answer
181 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 ...
3
votes
1answer
114 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 ...
2
votes
1answer
440 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
1answer
137 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
1answer
265 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 ...
0
votes
1answer
47 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
1answer
127 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, ...
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
1answer
800 views

Can I flash an unlocked G900T bootloader on a G900A?

I have a G900A and a G900T (short story: couldn't live any longer with the locked bootloader on G900A so I bought a G900T to use on AT&T). It's possible to flash a custom recovery/ROM onto the ...
0
votes
1answer
812 views

Enable bootloader screen for Lenovo Vibe Z

I pressed and held volume up key for sometime and my Lenovo Vibe Z is seems to be bricked (not charging or switching on). I would like to get into to the boot-loader screen to factory reset the device....
0
votes
1answer
463 views

Tethering with locked boot loader

A recent OTA update to KitKat removed the ability to tether my phone. I feel very frustrated by this bait and switch since I bought the phone for its ability to tether. The workaround is apparently to ...
-1
votes
1answer
182 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
votes
1answer
513 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. ...
-1
votes
1answer
1k views

unlocking bootloader moto g xt1033

I'm trying to root my MOTO G XT1033 DUAL SIM but in the videos I've seen till date it says that you need unlock the boot loader .I saw solution videos to unlock boot loader but all of them says that ...
2
votes
0answers
245 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 ...
2
votes
0answers
395 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
0answers
24 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 ...
1
vote
0answers
85 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 ...
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
0answers
181 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
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
0answers
445 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
361 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
0answers
23 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 ...
0
votes
0answers
128 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
0answers
90 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 ...
0
votes
0answers
164 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 ...
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 ...
0
votes
0answers
122 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
0answers
37 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 ...
0
votes
0answers
497 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
43 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 ...
0
votes
0answers
717 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 ...
0
votes
0answers
89 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
0answers
296 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!
0
votes
0answers
335 views

“Locking” a Samsung Bootloader

In order to prevent cold-boot attacks against an encrypted Android filesystem, it has been recommended to keep your bootloader locked at all times with the original factory recovery installed. The ...
0
votes
0answers
314 views

Htc stuck on bootlogo. S-on ,boot loader relocked. Cwm installed

My sisters htc desire is stuck in htc logo then a blue screen and then back at htc logo. Can't find a vodafone uk ruu. Hboot shows RELOCKED. and S-on.Any help please
0
votes
0answers
2k views

Xperia Z1 Bootloader Unlock Problem

I have been having problems trying to unlock the boot loader on my Z1. I followed the instructions provided by Sony to unlock. I had previously unlocked and relocked the device. However, now when ...
0
votes
0answers
14k views

**FAILED (remote: 12 signature verify fail)** HTC One M7

C:\xxx>fastboot flash recovery c:\recovery.img sending 'recovery' (10336 KB)... OKAY [ 1.988s] writing 'recovery'... (bootloader) signature checking... **FAILED (remote: 12 signature verify fail)**...
0
votes
0answers
959 views

SE BOOTLOADER v1.6 Problem (FAILED:phone is already unlocked)

I tried to unlock my bootloader with SE BOOTLOADER TOOL but get the message: (bootloader) Unlock phone requested FAILED (remote: Phone is already unlocked!) finished. total time: 0.002s What ...
0
votes
0answers
2k views

SE x10 will no longer boot

I am wondering if anyone can help me with my situation. I was using JAF 2.3.7 Rom for about 3 months with no issues. After installing Prey as well as Dropbox (only 2 new apps) the phone started to ...