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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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Pixel 8 'OEM unlock' greyed out

The phone is a brand new phone that was provided by my carrier in Canada (Telus). The phone is carrier unlocked. I verified this by putting a non Telus sim into it and making a call. Once the "...
Mike's user avatar
  • 101
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0 answers
17 views

Samsung A52 stuck in KG STATUS: CHECKING (00)

after I'm install new firmware on Samsung A52 from: https://samfw.com in Download Mode i got: CURREMT BINARY: Samsung Official FRP LOCK: OFF OEM LOCK: ON(L) KG STATUS: CHECKING (00) WARRANTY VOID: 0x) ...
aquku's user avatar
  • 1
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0 answers
37 views

Is it possible to skip the warning screen on a locked bootloader running custom firmware?

This question is from a malicious viewpoint to see if its possible that it happened in my case I have got answers before that if my bootloader is locked then a factory reset(/even reflash stock rom) ...
yehtemeh's user avatar
1 vote
0 answers
64 views

Tried to unlock Sony Xperia 5 III bootloader - now: "FAILED (Write to device failed (no link))"

As per title, I am trying to unlock the bootloader on my Sony Xperia 5 III. I have the global variant (XQ-BQ52) and confirmed it is unlockable. I am on W10 Ryzen based desktop system. I tried to ...
jvenborg's user avatar
1 vote
0 answers
16 views

Obscure Mio Tablet Stuck when Booting to Bootloader

In my journey to turn my extremely weak and unsupported Mio Tablet 10 into a Linux machine, I've come across a hurdle when trying to boot into bootloader mode from either ADB or the recovery menu on ...
Lior Dahan's user avatar
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0 answers
51 views

How can I fix a broken os?

I don't actually know if it's a broken OS, but, when I try to turn it on, the Motorola logo keeps flashing (the device is an Motorola G6). But it never actually turns on. When you press vol down ...
cris's user avatar
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0 answers
45 views

Flashing twrp failed on Moto G5s

I wanted to install twrp on Moto G5s but faced the following error: Inspiron-7501:~/Downloads$ fastboot flash recovery twrp-3.5.img (bootloader) is-logical:recovery: not found Sending 'recovery' (...
BBennett's user avatar
2 votes
0 answers
132 views

Fastboot boot twrp.img just boots back into bootloader

Im trying to boot in to the twrp.img for my Motorola Edge 20 (Berlin) because I can't flash it because my phone doesn't have an own partition for the recovery. fastboot says finished but my phone is ...
Loop's user avatar
  • 21
0 votes
0 answers
293 views

How do I root my Sonim XP8?

I'm working on rooting a Sonim XP8. This is a pretty obscure device, so it isn't easy to root. A lot of the normal options (fastboot, rooting apps, etc.) don't work because it's a pretty locked-down ...
Matthew's user avatar
1 vote
1 answer
155 views

Can we mod android phones using custom bootloader, firmware for MSM8909 Snapdragon 210

Can we mod android phones using custom bootloader (sbl secondary bootloader) , firmware for MSM8909 Snapdragon 210 (phone is zte835). Deleting all factory firmware, bootloader and using custom ...
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0 answers
188 views

Blackview BV9900 - Cannot Unlock Bootloader, Stuck In Fastboot Mode

I've been trying to follow multiple potential guides. The latest one I've tried is this one. Everything works fine, downloading the Android Platform Tools (adb, fastboot, etc), downloading + updating ...
ron wizzle's user avatar
1 vote
0 answers
383 views

Flash avb_custom_key using EDL

As documented here, many bootloaders will allow flashing a custom verity key to the avb_custom_key partition using fastboot. This then allows a custom chain of trust so the device will boot a custom ...
Ytagger's user avatar
  • 21
2 votes
1 answer
239 views

LG G Pad F 8.0 (UK495) Android 6.0: Cannot Access Bootloader or Recovery

I have an older LG G Pad F 8.0 (UK495). The tablet originally came with Android 5.1 but at some point received an official upgrade to 6.0. My ultimate goal is to hopefully root the device & ...
AntumDeluge's user avatar
0 votes
1 answer
459 views

Fastboot does not see device, but fastbootd does

My device: Tecno Camon 19 (cl6n) I need to unlock bootloader, adb see my phone correctly, fastbootd too. But when I do adb reboot bootloader neither the phone nor the PC can see each other. Phone says ...
Claym's user avatar
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0 answers
224 views

Unlocking moto g power bootloader

I have a moto g power (2021) Running Android 11 and I am searching For a way to unlock the boot loader. When I go to the Motorola website and Follow the steps to unlock it The website tells me that ...
crysmal's user avatar
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0 answers
151 views

Hard bricked with no bootloader and black screen

I have a redmi 7 onclite hard bricked in EDL mode (9008), my phone got black screen, no bootloader. I would like to know how to fix it. I don't have an authentication account, only a normal account ...
Alain's user avatar
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0 votes
1 answer
385 views

Can't unlock Pixel 6's bootloader

I have no problems finding my Pixel 6 through adb. Also, no problems finding the device with fastboot devices while in fastbootd. But for some reason, when I switch to bootloader, the computer doesn't ...
Dazai's user avatar
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0 votes
0 answers
245 views

Creating a backup partition on Android

It would be lovely if I could manually allocate a portion of space to create a partition for backup that's separated from the other partions that gets wiped or replaced when flashing a custom rom so ...
amera's user avatar
  • 21
1 vote
0 answers
75 views

Why should I update the bootloader when flashing custom ROM?

I have a Realme GT Neo2. The developer behind the custom ROMs says it's required to flash some firmware Firmware_EU_F.04_RM-Warning.zip. Inside the archive, there's an abl.img file which I believe is ...
amera's user avatar
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1 vote
1 answer
133 views

Is it possible to rescue data from a Google Nexus 5 which is stuck in bootloop with locked bootloader and no working recovery mode?

I have found my Google Nexus 5 which I had problems with in 2016 concerning the infamous stuck power button. At some point, the phone was stuck in a restarting loop. Then, I managed to leave this loop ...
JSONVorhees's user avatar
0 votes
1 answer
233 views

Can I connect to Wifi after flashing GSI

My old phone is running Android 10. I wanted to install Android 14 beta on it. Bootloader is locked. From what I know, unlocking bootloader would reset the device. Therefore Wifi passwords are gone. ...
sudoer's user avatar
  • 149
0 votes
1 answer
365 views

Secure boot on with no system

I have bought a cellphone (google nexus 5) and can only boot to bootloader, recovery seems erased since it will only reboot, same for system. I cannot flash anything since get_unlock_ability returns 0....
Yvain's user avatar
  • 121
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0 answers
457 views

How to secure an unlocked Bootloader after installing custom ROM?

To install a custom ROM, we obviously need an unlocked bootloader. But after installing a custom ROM, is there any way to password protect or secure the bootloader so that if the phone gets stolen or ...
Blackernel's user avatar
1 vote
1 answer
336 views

unlocking bootloader in ZTE blade 7 lite

i installed all drivers and also extracted adb and fastboot in my system so i enter "adb reboot bootloader" code in cmd after changing into adb folder and then when i enter "fastboot ...
Raman's user avatar
  • 11
2 votes
0 answers
329 views

User-settable Root of Trust supported devices

As mentioned in Android doc Devices can optionally allow the user to configure the root of trust (for example, a public key). Devices can use this user-settable root of trust for Verified Boot ...
a farahabadi's user avatar
1 vote
0 answers
315 views

Prevent Bypassing Android Verified Boot in custom ROM

Installing custom rom needs unlocked bootloader. so I unlocked bootloader. I built a custom android 12 rom with AVB enabled for system and boot partitions and flashed it. if I Installing apk through ...
a farahabadi's user avatar
1 vote
0 answers
505 views

Bootloader unlocking not working on Nokia T20

I have been trying to install an Android 13 GSI my Nokia T20 WiFi tablet (Model TA-1392) reached its final update ever. However, in order to flash the GSI onto the tablet, it said that I needed to ...
Saturanium's user avatar
1 vote
0 answers
68 views

How executable binary can be signed?

On most Android devices, the bootloader checks following bootloader/software sign, right? Chain of trust. Signing technically means that the file must be encrypt with one (private) key and decrypted ...
user385781's user avatar
1 vote
2 answers
1k views

How do I flash a custom kernel on Pixel 7

I built a custom kernel for my Pixel 7, to include the NFS kernel module. I'm struggling to flash this to my phone and get it loading. After I flash this to my phone, the Google text appears, but not ...
simonzack's user avatar
  • 111
1 vote
0 answers
240 views

Are system image and system partition the same thing?

Are system image and system partition the same thing? Are boot image and boot partition the same thing? Been reading about system root and system-less root. On some pages it says you have to modify ...
Kandx9's user avatar
  • 21
2 votes
0 answers
982 views

Strange message after wiping data/factory resetting on Pixel 6 device

Last night, I flashed my Pixel 6 phone because I want to move to Pixel 7. After flashing, I turned on the phone for a while, and then I used the Recovery >Wipe data/factory reset option. ...
Konrad Mazur's user avatar
2 votes
1 answer
817 views

Stuck on the boot screen with locked bootloader - Pixel 6

I was trying to flash a custom ROM on my phone (Pixel 6) and something went wrong. i was following the instructions on screen and the last one was to lock the bootloader which I did. Now the phone ...
pixis's user avatar
  • 21
1 vote
1 answer
371 views

Relocking bootloader on Asus Zenfone Max Pro M1 (ZB601KL/ZB602KL)

After a few dozen unsuccessful attempts to make TWRP recovery work and almost bricking my Asus Zenfone Max Pro M1 (ZB601KL/ZB602KL), I gave up and decided to relock the bootloader. But this turned out ...
Pavel Schriber's user avatar
1 vote
0 answers
561 views

Can't boot into bootloader on Oppo F1s

I can't get into fastboot mode on my Oppo F1s (A1601), Android 5.1. Here is what I'm doing: adb and fastboot are installed on Mac I have developer options and OEM unlock enabled In the terminal, adb ...
Md Shah Miran Sifat's user avatar
1 vote
1 answer
1k views

Force boot to bootloader (device always boots to recovery)

I was trying to flash TWRP onto my Android tablet (Lenovo TB-X306F), but something went wrong and it failed. Now, every time I boot, no matter what I do (sending adb commands or pressing physical ...
Tmpod's user avatar
  • 41
2 votes
1 answer
1k views

Can a hacker unlock the bootloader of an android device remotely?

Is it true that you can not unlock the bootloader of an android device remotely and the only way you can infect the firmware or bootloader is to have physical access to the device. What about rooting? ...
User4857's user avatar
0 votes
0 answers
116 views

Bootloader Is Unlocked But Yet Recovery Is Not Flashing (Fastboot Failed error)

I Unlocked My Bootloader And It Is Showing Me In Red Color (Bootloader:Unlocked) But When I Tried To Flash Recovery It Failed. recovery is device specific so no problem in recovery.
Priyanshu Jangid's user avatar
1 vote
0 answers
375 views

How do I extract the boot image from my ROM on my phone to modify with magisk? [duplicate]

I am trying to root my phone and I need to extract the boot img from the ROM on my phone preferably using the phone itself. Then I will modify the boot img with magisk. How can I extract the boot ...
User4857's user avatar
0 votes
0 answers
2k views

How To Charge Android Phone In Fastboot (Bootloader) Mode?

My Android Phone Is Not Charging. Bootloader Shows The Warning Battery Low. I Accedentaly Erased /Boot /Recovery /System Partition. And Because Battery Is Low I Can Not Flash Boot.Img And Recovery.Img....
Priyanshu Jangid's user avatar
0 votes
0 answers
569 views

Compiling Android Bootloader Little Kernel

I have successfully compiled Android bootloader from git://codeaurora.org/kernel/lk.git It produces a lk.bin file which I assume is the code for the bootloader. How do I pack that file into a ...
manit's user avatar
  • 101
0 votes
0 answers
75 views

Choosing correct OTA

Android OS crashed. Error Message Android Recovery TCL/REVL_2_5052w/A30ATMO 8.1.0/OPM1.171019.011/VAR4A-0 user/release-keys Think that means 8.1.0 = Oreo API level 27 https://developers.google.com/...
lfad's user avatar
  • 1
1 vote
0 answers
117 views

How to recover files from a Pixel 3 XL that cannot boot anymore

My Pixel 3 XL is up-to-date regarding the OTA updates i.e. I have the latest firmware installed. I've never done anything special regarding "tweaking", such as enabling the developer mode i....
magrac's user avatar
  • 11
1 vote
1 answer
850 views

Is it possible to dump the internal storage of an unrooted, boot-looping Android 9 with locked bootloader?

Is it possible to dump the internal storage of an unrooted, boot-looping Android 9 with locked bootloader via USB or to SD card, e.g. using some firmware tool in download or recovery mode? If YES, ...
srhslvmn's user avatar
  • 289
1 vote
1 answer
2k views

Pixel 3 stuck in fastboot loop after flashing factory image

The problem After trying to flash a factory image of Android to my (previously working) Pixel 3, I can now no longer exit the bootloader, nor can I boot into the system. The bootloader simply reads no ...
Chris Nemarich's user avatar
1 vote
0 answers
26 views

My motorola 5g stylus updated and the keyboard for logging in is gone

My information is as follows. My keyboard is the default keyboard. I disabled gboard. The update was last night. I was not logged in when I clicked update, (it was a security update, I turned it on ...
Heather Frye's user avatar
1 vote
0 answers
266 views

Can't relock bootloader

So i'm trying to relock my bootloader after unlocking it. I have a Realme 5 pro and i tried relocking it using adb and fastboot flashing lock but it gives me the following error: FAILED (command write ...
abssuper 20's user avatar
4 votes
1 answer
2k views

Cannot Unlock Bootloader on Fairphone 4

I have been attempting to install /e/ OS on a Fairphone 4 in accordance with these instructions: https://doc.e.foundation/devices/FP4/install and I am stuck on Step 6 of Unlocking the Bootloader. No ...
RedHack's user avatar
  • 143
1 vote
0 answers
1k views

Failing to flash custom (Magisk-patched) boot.img to Samsung S20 FE (4G) with Heimdall

I am attempting to flash a Magisk-patched boot.img from Linux onto my unlocked SM-G780G. I have so far tried doing that using fastboot flash ... to which the device responded that it doesn't know the ...
0xC0000022L's user avatar
1 vote
0 answers
308 views

Can't unlock my Acer B3-A30 tablet's bootloader

So I have an Acer Acer B3-A30 tablet, which is stuck on the Acer logo. I'm trying to unlock it's bootloader (with fastboot mode), so I can reflash it (with a stock rom), but it just shows an error ...
3060PlayZ's user avatar
  • 165
2 votes
1 answer
215 views

Backup Pixel 3 before erasing phone with TWRP

I am attempting to take a recovery/backup of a Pixel 3 using TWRP. I do not need to flash TWRP, just boot from it to perform the backup. Meaning, I don't care if TWRP is installed permanently. The ...
Mikolaj's user avatar
  • 131

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