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Questions tagged [bootloader]

for questions on the bootloader, which is kind of "BIOS mode" on Android devices

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1answer
51 views

ADB/Fastboot not detecting Android stuck in bootloader

I tried to flash the most recent android pie update to my pixel 2 only for it to fail writing partitions even though I followed a recent guide to my best ability. Now, the phone is stuck in the ...
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1answer
23 views

Have oem unlocking option available in nokia 3 ,do i have to unlock bootloader?

there are guides on rooting and it first requires to unlock bootloader on nokia3, at first i did do it but due to some issue i had flash firmware ,after flashing back there was a option available of ...
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35 views

Can't unlock my phones bootloader

I'm using a local branded chinese phone. And my phones comes with locked bootloader. As it is a local branded phone, manufacture doesn't provide a official way to unlock it! I've tried many way I ...
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1answer
36 views

Unlocking Bootloader Android 7.1.2

I have a RCA device running Android 7.1.2. I'm having difficulty unlocking the bootloader. On my device I've an option to turn on OEM Unlocking. When I try it asks if I want to enable when I select ...
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1answer
289 views

Huawei bootloader: what is “FB Lock” and how to unlock it?

I was playing around with my spare Huawei phone trying to bypass the security without wiping data and came along this article: https://blog.salvationdata.com/2018/09/07/case-study-mobile-forensics-a-...
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1answer
63 views

Android device load process (preparing flashing)

Standard Android OS load process looks like (from docs): BootROM (starts with 'on' button) Bootloader Kernel init/mounting Zygote+Dalvik VM System services But I have a difficulties ...
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59 views

Motorola Moto G5 crashes when trying to use WhatsApp’s web app and won’t reboot anymore (LineageOS/ViperOS)

First, I tried to install LineageOS on my Motorola Moto G5 which worked perfectly fine – until I installed WhatsApp and tried to open its web application. Therefore, one has to scan a QR-code. But ...
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1answer
158 views

how to succesfully boot into bootloader/fastboot mode on alcatel 5049z smartphone

I am having issues( i am a "novice" when it comes to unlocking a30 android bootloader with a PC...) with booting into bootloader/fastboot mode on my stock rom--android 7--Alcatel a30(non rooted 5049z?)...
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1answer
48 views

Can't unlock bootloader Moto G5 XT1672

I'm trying to unlock the bootloader on my Moto G5, the adb commands works, but I can't find my device in the command prompt when it is in fastboot mode. I was following the instructions on this ...
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1answer
100 views

How do I lock my bootloader with adb

I tried to unlock my bootloader with fastboot but that didn't work >fastboot oem relock XXXXXXXXXXXXXXXX FAILED (remote: 'root type is risk') Finished. Total time: 0.014s So I thought that adb ...
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30 views

Unlock Moto X without using Motorola Unlock?

Motorola provides a site to unlock the phone. essentially you paste in data fastboot gives you, then you past in the result that the site gives you to fast boot. Is there a way to unlock the phone ...
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1answer
189 views

How to prove that the bootloader of a device is unlockable when it currently shows as locked?

A newly bought Pixel device from a random seller can switch between carriers but the bootloader shows as locked. Are all pixel devices' bootloaders locked by default? And how to show that it is ...
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179 views

How to upgrade bootloader only?

I have a Sony Z3 Compact running with a CyanogenMod version 12.1 from January 2016. Also installed is TWRP 2.8.7.0. As some apps are performing unstable, I want to switch to CarbonROM (at least cr-5.1,...
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1answer
43 views

Multiple problems with HTC M8S after rom upgrade

I have an old HTC M8S I'm trying to give a new lease on life by getting off the stock ROM. It's an EE (read Orange UK) branded phone. romver: 1.11.61.2 CID: ORANG001 ModelID: 0PKV10000 Project: ...
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2answers
312 views

Fastboot unlock failed

I have a Nokia 6 and whenever I try to unlock my device I am facing error. The command sudo fastboot oem unlock The result (remote: oem unlock is not allowed) Any suggestions?
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525 views

Install LinageOS on LG G6 H870DS without unlocking the bootloader (which doesn't seem possible)

I have a H870DS and want to install LineageOS on it. So the first step would be unlocking the bootloader and install TWRP. After some research, it seems that I bought a brick: After following the ...
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42 views

Root Processes Identification

I want to understand which thread/processes are executed at system level while an applications reads/writes something on root directory (for example - If an application is storing some user data on ...
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1answer
50 views

Why can't Odin recognize the phone in system recovery?

If I boot the phone in system recovery, it doesn't detect the phone: But when I boot the phone normally, Odin can detect it: If I flash TWRP recovery anyway, the log is: <ID:0/004> Odin ...
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1answer
203 views

(Samsung) Possibility to check bootloader status using PC

Is it possible to check bootloader status using adb of a samsung device back from 2014 or older? (s5 and below) there's no fastboot, and no "OEM Unlock" in developer options and since i need to get ...
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1answer
157 views

As of vendors - whose bootloaders are easy to unlock, and whose not?

The vendors differ in their attitude to unlocking the bootloader. Some require codes for unlocking, some not. Some require proprietary, Windows-only software, other not. Which of the vendors are ...
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222 views

Is it possible to unlock the bootloader of moto e4 without computer?

I want to root my phone but I dont have a computer to unlock the bootloader so im wondering if it is posible to do this without a computer if so how? I tried googling how to do this but google thinks ...
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278 views

Possible to use mods with locked bootloader? Xposed, Root, zip files Twrp

I want to unlock bootloader install twrp, flash xposed and magisk zip files through twrp. Flash the stock roms recovery again relock the bootloader to be able to use those mods. Is this possible, i ...
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26 views

How to change bootloader device name? [duplicate]

Please read this first: How to hide or spoof bootloader info from any app? Can we at least change the bootloader name? Thereby altering the device identity by giving a new code name. I hope you will ...
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1answer
1k views

How to hide or spoof bootloader info from any app?

I have spent hours trying to perfect build.prop and when I finally was at the end I forgot about this leakage. Any app can easily know device's bootloader info. I realized this when I ran CPU-Z. ...
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59 views

Is it possible to enable and use USB debugging with an Android device turned off?

I heard about the procedure: Connect the device to the computer by USB holding the UP button; I tried and did not see results. I need something more detailed. I have a Philco tablet that looks like ...
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1answer
106 views

What is the lock in bootloader?

I know how to unlock. It's through fastboot oem unlock. I know why the manufactures place a lock. It's for security reasons. But what is the lock? Is it a file in the system, saying "Hey, the ...
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1answer
50 views

Xiaomi Mi5s plus' display won't turn on after updating LOS

I encountered a very strange problem with my Mi5s plus (natrium). I was flashing the recent LOS 20180717 version, Open GApps Aroma and Magisk 16.0 via TWRP (in that order). That's my usual procedure ...
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79 views

Sony XPeria T service menu app missing

I just found out that I have a Sony XPeria T, not a Sony XPeria Z1 Compact. After years of owning it. Wow. So I wanted to try some things that I previously discarded because they weren't possible with ...
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58 views

Asus Fonepad 7 bootloader is lost

Trying to flash my tablet (K012 Fonepad 7 fe170cg) I ran this commad fastboot flash fastboot boot.img and now the bootloader is lost and just a splashscreen is shown after I turn the tablet on. So ...
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2answers
58 views

Who is responsible for locking the bootloader?

I was wondering who is in charge of the locking of bootloaders. I recently chatted with a representative from LG-UK enquiring about the unlocking of bootloaders. I was told that I need to speak to ...
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2answers
1k views

How do I know If my phones Bootloader is locked or not?

I want to flash TWRP & SuperSU to take a backup, but I read that if you flash TWRP with a locked bootloader it would brick my device & wipe my data, now that would just defeat the purpose. How ...
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0answers
584 views

OEM Unlock for Samsung S9 not shown

I have a brand new sealed Samsung S9 SM-G960F/DS which is most probably Exynos variant however I couldn't find OEM Unlock after activating the developer tools. I've googled that and was surprised that ...
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2answers
4k views

How to Upgrade Sony Xperia Z3 Compact (D5803) to Android 8.1?

How do you upgrade the Sony Xperia Z3 Compact (D5803) to Android 8.1? There are a number of web pages that attempt to answer this question, but none of them provide every step along the way. These ...
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0answers
157 views

How to open the bootloader for Acer DA220HQL?

Got this DA220HQL from my mom, it was plugged in like once before, and is about 9 years old. I plugged it in, started it up, and it had the glaringly bad ui of Android v4 something. I nearly hurled, ...
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1answer
97 views

Is my Android device booting into a “stealth” partition?

OK, this is a weird problem I’m encountering with an Android system I’ve been using without problems for several years now… and I’m practically out of ideas on how to potentially fix it. Let’s start ...
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186 views

Moto g4 plus can't be unlocked

When I go to unlock my moto g4 plus, I get a message that my computer cannot be unlocked. This is the getvar all result (bootloader) version: 0.5 (bootloader) version-bootloader: moto-msm8952-B1.07 (...
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33 views

Where is the “enable developer option” written to?

When enabling "developer option" on device, then the serial number of device becomes known when connecting device to PC, and booting into bootloader. adb devices List of devices attached ...
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0answers
74 views

SW Rev. error downgrading from Android 7.0 to 6.0.1

I am downgrading from android 7.0 to android 6.0.1 b/c of app compatibility issues. My phone is the SM-N920W8 Galaxy note 5. I get the error "Device: 5 Binary: 4" which I assume is device boot ...
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1answer
69 views

My phone doesn't boot at all after restarting bootloader

My phone is Huawei Y3II. Now, my phone is not starting, no matter how I press the power button. I have tried Smart Phone Flash Tool, but it failed and it got an error 2004 - 6045. Now, it does ...
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806 views

Android x86 won't boot with GRUB 2 - stuck at Detecting Android x86

I recently installed Android x86, using ~~99 GB free space on an old drive, partitioning it into /dev/sdb3. After reinstalling grub (accidentally selected "yes install grub" in the installation menu),...
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18 views

How to root Xperia C?

I cannot initiate bootloader in my Xperia C. Is there a way I can manage to root my Xperia C to initiate bootloader? I found KingRoot but it seems that it is an endless wait to finished the load.
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0answers
262 views

Phone not booting into fastboot

I have decided to root my phone (Totally Chinese-ass device from my country with absolutely no documentation online). After several attempts (kingroot, kingo, towelroot, srsroot,) nothing has worked. ...
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1answer
956 views

HTC one M8 won't flash RUU or unlock Bootloader

I hope u r havin a good day -I just found out that model on the back of the phone is 0P6B100 while it's 0P6B700 in getvar, I found that out after trying all the x.xx.651.x RUUs flashed down below cuz ...
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2answers
830 views

Nexus 7: Unable to install factory image, stuck in < waiting for any device >

I want to restore factory android on my Nexus 7 2012 WiFi. I'm following the official guide. I start the device in fastboot mode by executiong: adb reboot bootloader This works well. But when I ...
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0answers
201 views

Can galaxy s8 boot from sd card?

I would want to know if i can boot my galaxy s8(exynos)(android 7.0) from sd card so i could have non-rooted android on my internal sd, and rooted and dual-booted with ubuntu on sd card(64 gb(class 10)...
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1answer
2k views

Odin custom bootloader flash fail (but original stock bootloader flash successful)

This question is regarding my Samsung J5 running Android 5.1.1. I am able to flash the bootloader (BL) with original stock bootloader. Odin clearly shows the boot partition being flashed and then ...
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0answers
110 views

Galaxy S4 SCH-I545 stuck in Start Up Failed

After using the Official TWRP app to flash TWRP recovery to my Samsung Galaxy S4, I am stuck on a screen that says "Start-Up Failed" and "Secure Fail: Kernel." I think it is because I flashed it to ...
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0answers
1k views

Android x86 not change resolution on Virtualbox and VMware Workstation

I installed android-x86_64-6.0-r3.iso and after launch I see: I tried to change resolution as described here: Android x86 Marshmallow not booting on Virtualbox and VMware Workstation https://www....
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1answer
147 views

Input Keyevent in fastboot mode?

I'm trying to unlock the bootloader of my old Alcatel OneTouch Idol X+. I got to the point where my phone would ask me to press volume-up to confirm that. Due to a bug of which i read several times ...
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1answer
61 views

Preventing booting from unwanted/upgraded partition in Android

As I understand in Nougat and greater the system has two full partitions, one currently used and the second one that is used for upgrading. So during an upgrade the new bits are laid down on the ...