Questions tagged [bootloader]

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

221 questions with no upvoted or accepted answers
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7
votes
0answers
22k views

Device boots normally, but cannot enter recovery or fastboot

I have secondhand Vodafone Smart Tab 4G. It seems to me that previous owner messed something up. The device boots normally but I cannot enter either bootloader, fastboot, or recovery. I have tried HW ...
6
votes
1answer
152 views

Where does the code pertaing to fastboot mode reside?

Is it in the primary-bootloader (on the mb), or the secondary-bootloader(on the emmc)? My motive behid the question is to understand what other codes are executed before system can get into fastboot ...
5
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1answer
162k 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 ...
4
votes
1answer
464 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 ...
4
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0answers
6k views

fastboot oem unlock: hangs with `…'

First of all, I am a newbie to Android. I am using Ubuntu Gnome 14.10 to run all the commads. I am trying to unlock the bootloader of my Lenovo A536 (stock Android 4.4.2 aka KitKat). Here is what I ...
4
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4answers
11k views

How to re lock bootloader on samsung galaxy s5?

I have Unlocked Rooted Samsung Galaxy S5 recently it has been giving me a lot of issues and I want to send it to Samsung for repair meant. I understand that once you root your device you loose the ...
3
votes
1answer
4k views

Is it possible to install a custom Android ROM if the bootloader is locked?

Suppose the bootloader of an Android device is locked. Is there any way to install a custom ROM without unlocking the bootloader? If yes, then how?
3
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0answers
1k views

How to change the boot logo, Not the bootanimation 4.2.2

Im trying to find out if I can change the boot logo, the one that shows up right before the bootanimation. Currently it show's me a linux logo. I am looking to either completely remove it or change ...
3
votes
0answers
473 views

Nexus 6 no longer turns on, now that I have flashed a Marshmallow ROM + bootloader

I have a Google Nexus 6 (Telus/AT&T) and I had been successfully running the Lollipop version of Chroma for months now. Yesterday I flashed Chroma Marshmallow ROM, and the recommended Google Apps, ...
3
votes
0answers
552 views

How does encrypting a bootloader prevent it from being unlocked

As I'm waiting patiently (sigh) for the at&t note 4 root, I have been trying to understand the process of rooting. This website does a good job of describing what a locked/unlocked bootloader is, ...
3
votes
1answer
2k views

Device freezes after trying to reboot with bootloader

I have been trying to unlock my bootloader as per the instructions found here. I already have installed the drivers from Google USB driver folder that comes in Android SDK "extras" folder. However, ...
3
votes
0answers
97 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
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0answers
30 views

is it possable to install a linux distro ie:- nethunter on a android device

I have been trying to work out how to use my old Android tablet as a stand alone Linux tool for pen-testing and network monitoring and logging. I have it boot straight into the OS without having to ...
2
votes
2answers
2k views

Trouble Unlocking Bootloader on Android Device (RCA Voyager Tablet)

Okay, so I've figured out how to set up ADB on Mac OS X and I've followed all the instructions on how to get to Fastboot from ADB. The last command I use is: fastboot oem unlock This command in ...
2
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0answers
2k views

(SOLVED) How (methods) to unlock Bootloader on own Xiaomi Mi5 MIUI8 (Data Recovery context)

UPDATE: 2018/06/27, bootloader implies wipe and it is a dead end for Data Recovery, mount as USB Mass Storage implies root to change settings, and for Mi5 or MIUI 8 this implies flashing ROM (dead end ...
2
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0answers
2k views

[Nokia 3]adb reboot bootloader failed

I have Nokia 3 Android 7.1.1 connected to PC Windows 8. Problem is: C:\>adb reboot bootloader reboot failed: -1 Reason to do it is to flash/root in future. Other commands ok: C:\>adb devices ...
2
votes
0answers
367 views

Phone's power and volume buttons will not work in bootloader

I have recently decided to unlock the bootloader of my BLU Studio X8 HD. I have first installed the ADB drivers and afterwards I have used the command adb reboot bootloader to boot the device into the ...
2
votes
0answers
2k views

Unlock Moto E OEM Bootloader without the Passcode from Motorola

I need to unlock my Moto E phone(2nd Gen). To do this, I want to unlock the bootloader first. I got the 'get_unlock_data' and sent it to Motorola, But I did not get the passcode from them :( Could ...
2
votes
0answers
65k views

What does rebooting bootloader do?

I recently got a OnePlus 3T, then I updated it and now it's bricked. I cannot access recovery mode. I figured out how to get to a screen where I can reboot the bootloader. What does it do? Will it fix ...
2
votes
0answers
508 views

su fails: “wget: bad address 'static.zhiqupk.com'” and unable to unlock bootloader

A friend of mine bought a used Samsung Galaxy S6 or at least we thought so, but it looks that it might be a chinese phone. After wiping all data/cache, the phone still had a lot porn/advertisement ...
2
votes
0answers
1k views

How to recover Nexus 5 data from memory chip

Edit 2: My Nexus 5 doesn't boot up the OS or the Recovery, but it boots the Bootloader. The service people speculate that the power IC isn't able to supply enough power for the first two but it's ...
2
votes
0answers
774 views

White screen while charging when phone is off

I'm using my phone (Lenovo A660) since more than two years. Usually, I do not boot the phone to often (approximately once a month). However, I recently realized when I turned of the phone, that the ...
2
votes
2answers
9k views

How to unroot and lock bootloader in HTC desire 820?

I have unlocked the bootloader with windroid, then I flashed TWRP recovery, then I flashed supersu zip file through TWRP to root my phone. Now I want to Unroot and relock the bootloader, but when I ...
2
votes
0answers
275 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
841 views

How can I see bootloader stdout debugging messages?

I'm trying to understand the mechanisms of the Android bootloader. The source code for this is here: https://code.google.com/p/android-source-browsing/source/browse/recovery.cpp?repo=platform--...
2
votes
0answers
2k 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 ...
2
votes
1answer
6k views

BOOTLOADER - USB Device Not Recognized

I am currently using a ROOTED "Huawei MediaPad 7 Lite" tablet and am having issues entering the bootloader. When powered on and connected to a PC, the device is seen in adb using the command ...
2
votes
1answer
6k views

Difference between bootloader and Download mode in Samsung Galaxy tablets

I'm working on Samsung Galaxy Tab tablets, specifically with Tab 3 (SM-T210) and Tab 4 (SM-T230), and being learning a bit about the boot and recovery images and the bootloader. I have not being able ...
1
vote
0answers
16 views

If I generate my own custom key and sign a custom ROM, then will I be able to have root access after locking the bootloader?

So what I want to do is boot into my own custom ROM with a locked bootloader. I have a OnePlus 6T so it's possible, but can I have root access after I boot with a locked bootloader? If I replace my ...
1
vote
0answers
28 views

Asus Zenfone 3 Max - ZC520TL - Cant boot anymore - Only fastboot

I have a Asus Zenfone 3 Max, ZC520TL, MT6737M WWW_phone X008_1, 7.0/NRD 90M 14.10.1808.119-2018 I wanted to install lineage on my phone without rooting it (I want to be able to use banking app), I ...
1
vote
1answer
32 views

Installing lineageOS

I have a tab S2 stuck on 5.02 I wanted to upgrade the software to lineagOS There are lots of information out there but nothing that can help me. A few things first that I need to share. Im usung a ...
1
vote
0answers
28 views

If I unlock the FRP on my Samsung S7, can I root my phone?

I'm having a lot of trouble to unlock the bootloader, but managed to unlock the FRP. Can I root the phone? Also, while on download mode, is it required to use a USB original cable? My download mode ...
1
vote
0answers
82 views

Redmi Note 7 isn't showing up in fastboot (Linux/Windows)

So I am trying to unlock the bootloader on my Xiaomi Redmi Note 7 and therefore I need to have access to adb and fastboot. I'm very frustrated because I couldn't find a solution within the last 3 ...
1
vote
0answers
31 views

Change Android Bootloader Splash Screen Image

How can I change the bootloader splash image that shows up as soon as the system is powered on? Note that I am not talking about the logo which is shown after the kernel has loaded (IE: after 'init'). ...
1
vote
1answer
292 views

Bootloop issue and can't go to recovery mode

I am using Asus Zenfone 3 ZE552KL, it got hang and then i tried to restart the phone but it get stucked in, Also I can't get in to recovery using standard method. Generally I keep USB debugging mode ...
1
vote
0answers
48 views

Phone (Nexus Zenfone 5 !!MODEL ZE620KL!!) only boots into TWRP

So I unlocked my bootloader and flashed twrp, but my data was auto-encrypted so i had to perform a wipe from inside twrp. I did this and now everytime i start my phone it boots into twrp. I tried ...
1
vote
0answers
49 views

Cannot unlock Motorola C following the instructions from Motorola

I have: Created an account with Motorola Enabled developer mode Enabled "OEM unlocking" Enabled USB debugging Disabled the lock-screen PIN I then connected the device to my PC with a USB cable and ...
1
vote
0answers
435 views

Stuck on “Bootloader is unlocked” screen, can't boot into recovery

So I wanted to root my OnePlus 6 after updating to android 10 (OnePlus6Oxygen_22_OTA_041_all_1911142043_dde113e5 3cd0f9.zip) I tried booting into twrp via fastboot using fastboot flash boot twrp.img (...
1
vote
0answers
110 views

Upgrading a locked Android 4.4.2

I want to try to upgrade my Huawei Y560-U02 Android 4.4.2 to anything newer but it should at least be Android Lollipop. I opened another thread in regards for this phone in order to get the firewall ...
1
vote
1answer
1k views

bootloader boot loop

I got a new Pixel 2 and wanted to load an TWRP backup from my previous Pixel 2 (with stock ROM) onto it, instead of setting it up freshly. So I booted the new device clicked through the settings ...
1
vote
0answers
260 views

stuck on“Downloading… Do not turn off target!” when trying to boot via adb

I wish to flash a custom ROM on my galaxy tab a. To do this I downloaded ADB and twrp-3.2.3-0. when U run the command adb reboot bootloader my tab gets stuck on downloading... do not turn off target. ...
1
vote
1answer
55 views

Boot from SD or external hardware device?

I've tried researching this before, but was unable to encounter an answer. Can you boot a rooted device through USB-C, SD, or something? I'm currently running a Galaxy S9+ and want to keep Android Pie ...
1
vote
0answers
220 views

Android verified boot and custom ROMs

I'm trying to figure out how exactly works the Android Verified Boot process and its usage with custom ROMs. The documentation I found on it is unclear (or outdated) as there seems to be several ways ...
1
vote
0answers
162 views

Seemingly dead Sony Z5 Compact gets detected as QHSUSB Bulk

My 2 year old Z5c (E5823, non rooted, official Sony Nougat update) died while updating some app, and doesn’t show any signs of life since then. Connecting the charger doesn’t turn on LED indicator, ...
1
vote
0answers
69 views

unable to flash stock rom in swipe elite plus

I'm trying to flash MIUI 8 on my Swipe Elite Plus. It fails and the is device not booting; it's stuck into the Videocon boot logo. After that I successfully flashed the Swipe Elite Plus stock ROM, in ...
1
vote
0answers
158 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 ...
1
vote
0answers
3k 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....
1
vote
1answer
274 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 ...
1
vote
1answer
344 views

fastboot does not recognize my LAVA Iris Atom

I've been doing quite the research on this error, but couldn't find a solution that could help me with my device. Adb commands works fine, but not fastboot commands. I have tried several sites for ...
1
vote
0answers
1k views

How to get Huawei Product ID without stock ROM?

I have Lineage as opposed to the stock ROM, so putting: *#*#1357946#*#* does not work for me. Recommended on alternate posts were downloading a program called "Huawei Product ID Generator", but ...

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