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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
42 views

How to access the download mode of a device with a outdated bootloader?

I accidentally flashed some outdated bootloader firmware and now I cannot seem to access the bootloader I tried holding the vol up + power and both to volume buttons + power but it made the phone ...
1
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1answer
51 views

Recover data, photo, & video from a dead water-damaged Android phone

Question Recover data photo video from a dead water damaged android phone I have a old android mobile which was kept on table on which glass of water falled and water entered the mobile as its ...
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0answers
14 views

Autodeletion of bootup sound

a noob here My stock rom doesn't have a default boot soundBut my old device has a boot sound(Which means I can change it)Then my question is that how can I set boot up sound on my relatively newer ...
3
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1answer
268 views

Where is Boot flow screen displayed in android

I have came across Boot flow and when there is based on boot state of a device, it shows different colot screen. YELLOW: Warning screen for LOCKED devices with custom root of trust set ORANGE: Warning ...
1
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1answer
34 views

How to unlock the bootloader of Samsung galaxy grand 2?

I searched the whole internet and couldn't find any guide for unlocking the bootloader of this specific model. my main goal is to install Lineage OS but the instructions on the page don't seem to be ...
1
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0answers
39 views

How to get information parameters from kernel after boot loads android?

when an (Android) bootloader starts loading kernel, it passes some parameters to the kernel (for example androidboot.verifiedbootstate, ...),how to get the information whether boot gets successful or ...
1
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0answers
57 views

How to execute Android verified boot during first boot after updating OS in Android

I need to execute AVB (Android verified boot) during first boot after updating Android OS. BOARD_AVB_ENABLE = true is already present in the mk file device/hikey/common/BoardConfigCommon.mk in the ...
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0answers
33 views

How to I unlock the bootloader on an Honor 7s?

I've attempted to unlock the bootloader using the fastboot method using ADB tools on my pc, which have yielded no results. I open powershell in the folder containing all the ADB tools and run "...
1
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1answer
35 views

How to remove the Ubuntu Touch kernel at startup?

I have tried the latest Ubuntu Touch on Nexus 5, but it was useless because an exential app doesn't work with Anbox. So i want to try an Lineage 18.1 unofficial image. I have installed the image with ...
1
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1answer
33 views

Does the bootloader reset after removing the battery?

After successfully flashing a modern custom ROM on my old phone, I tried doing the same with my girlfriend's old Lenovo Vibe P1m. However, after mistakenly pulling out the USB cable at the worst time ...
1
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0answers
45 views

is it possible to replace the bootloader firmware to unlock a 64bits cpu?

Sm-j700m cpu is arm64 but only allows 32bits android on it. From here: https://www.reddit.com/r/LineageOS/comments/p9p3s3/comment/h9zan52/ I thought that, if the bootloader could be replaced or ...
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0answers
49 views

t00j flashing unlock unknown command

I have been trying to unlock my devices(zefnone 5 t00j) bootloader, when i type fastboot oem unlock i get FAILED (remote: 'unknown OEM command') fastboot: error: Command failed on the cmd, and when i ...
0
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1answer
41 views

Note 10+ not showing up in Device Manager while in fastboot

I'm trying to unlock my bootloader so that I can root my Samsung Galaxy Note 10 plus. The problem is that fastboot devices doesn't show any devices, so I found out that I need to install new fastboot ...
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0answers
59 views

Reverse engineering the Stylo6 bootloader unlock

I've unlocked the bootloader and I'm analyzing the backups from before and after the unlock to find many partitions have changed, I want to find a way that will anyone to unlock their bootloader in ...
1
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0answers
35 views

How factory reset process looks in details?

So I tried to find answer for this question, but it is very hard to find something other than simple instruction of doing factory reset and backuping data. I'm interested of detailed process of the ...
1
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0answers
30 views

How to press power button using fastboot command?

I want to unlock my Oneplus 6 bootloader. But my power button is not working, so at the screen where I have to select, 'unlock the bootloader' I don't know how to do it without Power button?? Hope u ...
1
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0answers
40 views

Can I use Odin 3.12.7 T Flash option to install u-boot onto my SD card without tripping knox?

I'm curious, if I can eventually dual boot on my Galaxy Tab Active 3, because some games are broken on the newest One UI and I want to take control over my OS without the limiting security and ...
2
votes
1answer
58 views

how to get data from Android phone internal memory in downloading or recovery mode

My Yotaphone 2 started to boot loop (can not finish booting). I can only reach "Downloading mode" or Android system recovery with options: "reboot system now" "apply update ...
1
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0answers
17 views

Is there any way to change default boot mode?

A couple months ago I've installed Lineage OS on my phone and I'm pretty sure I've set the default boot mode to be fastboot. Now, whenever I boot my phone: it boots on fastboot mode. Which is not ...
1
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0answers
38 views

What can I do with an open source phone/kernel?

So this is my very first attempt in any kind of android development. I have here my phone's official kernel source. I was wondering if I can build this to boot or if it's ready for building. Also this ...
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0answers
13 views

Redmi note 3 showing enter code to unlock. After successive reboot

Redmi note 3 asking for password after successive rebooting the phone and i couldnt enable the password or any locking mathod in phone. After rebooting the screen gets more brighter and this massage ...
1
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0answers
43 views

What is the difference between `fastboot reboot bootloader` and `fastboot reboot-bootloader`?

fastboot provides two methods for rebooting a device into the bootloader: fastboot reboot bootloader fastboot reboot-bootloader How (and whyy) are these two commands different and when is it ...
2
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0answers
31 views

Trying to root Pixel XL

I'm trying to root a Pixel XL in order to use 'su' in an adb shell to run gdbserver. I've unlocked a few other phones to do this but the process seems a little different now or it is for this ...
1
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0answers
21 views

Redmi 8 bootloop

My Redmi 8 phone is in bootloop. It got stuck with its Remi logo and does not start. I am trying to unlock the bootloader but I didn't find a way other than mi unlock which I don't know how to use it ...
-1
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1answer
69 views

What does it mean for a bootloader to be locked/unlocked?

What exactly does it mean in this context to be locked anyways?
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0answers
43 views

Bootloader won't load any commands

My Bootloader won't do anything, when I type fastboot getvar all it stops giving the strings half way, or when typing any other command it will only give ... and nothing more. Bootloader log only ...
3
votes
1answer
542 views

Cannot boot into fastbootd OnePlus 8T

I'm trying to manually flash the factory image on my OnePlus 8T (using this TCD guide). I was able to boot my phone into Fastboot mode using the volume + power keys. I'm able to execute fastboot ...
1
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0answers
47 views

Deny access to fastboot

I'm searching a way to deny access to fastboot mode... I don't care if it will be deleted, just want to deny access but still be able to use the device. I rooted my phone but I didn't find any files ...
1
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0answers
26 views

How do I enable ROOT Access on my J3 Orbit?

My mobile is a Samsumg Galaxy J3 Orbit/ J3TOP. I've been trying to gain root access to enable superuser on it, but it doesn't work. It doesn't even say that I'm a user or device owner, how do I solve ...
1
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0answers
21 views

Unlocking bootloader for samsung A10 only

Is there any possible way to unlock bootloader on samsung A10..I've tried fastboot I've tried everything..LXDE?..I'm dying here..
1
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0answers
61 views

Is it possible to corrupt the bootloader from within the System / ROM?

I had a previously working Pixel 3XL, running Dirty Unicorns (flashed in December). I hadn't touched the bootloader / fastboot since then, but just a couple of days ago, I rebooted the phone and it ...
1
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0answers
25 views

stuck on Bootloop twrp not installing

HI guys my phone is stuck on fastboot, its showing the current image(boot/recovery) have been destroyed and can not boot pressing volume + power put it into fastboot and it shows in adb "fastboot ...
2
votes
0answers
131 views

Samsung bootloader unlock but failed to flash custom rom

I go to Settings > About Phone > Software Information then tap the Build number 7 times to enable Developer Options. Then I connected my device to the internet and go to Settings > Developer ...
1
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0answers
34 views

What does "NOS-production: no" mean?

I recently bought a refurbished unlocked Pixel 3 XL to replace my aging, cracked, broken one of the same model. It came with the bootloader unlocked so I decided to lock it because I didn't like the ...
0
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0answers
199 views

ROG phone 5, Unable to unlock bootloader

i have ROG phone 5, chinese variant with global ROM. i installed Asus Bootloader unlock app which to no luck. i tried to do it via fastboot using adb..tried the following commands fastboot flashing ...
0
votes
1answer
28 views

Nexus 5 not appearing in fastboot devices menu

I'm attempting to flash Android 4.4.4 KitKat onto my old Nexus 5, but when I run the fastboot devices command, it does not show my device's serial number. When I try doing the ADB sideload command ...
0
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0answers
19 views

Stopped between flashing miui to downgrade 12 to 11 and phone got erased every thing

I tried to flash my phone through mi flashtool to downgrade miui from 12 to 11. But took too much time about one hour. I checked the status which showed mismatch between phone and image. I closed ...
1
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0answers
109 views

How can I relock my Xiaomi bootloader without bricking the phone?

I unlocked the bootloader on my Xiaomi Mi A1, and it boots fine. However, after I relocked it (using the top answer here) and rebooted, the phone flashed the white Android loading screen then went ...
2
votes
2answers
231 views

How to achieve factory-reset or bootloader mode for Flywheel (Glorystar Nebula rf3288) tablet without buttons?

I've gotten stuck trying to upgrade a Glorystar Nebula 15 kiosk Android tablet (as customized for the orphaned Flywheel spin-bikes) to a vendor-provided single-file Android 7.1 firmware image (7....
1
vote
0answers
33 views

How to delete the Multiuser mode in my mobile?

I would like to remove(delete) the Multiuser mode in Realme XT. I want my phone to be simple. I have unlocked bootloader and rooted my phone and removed all useless bloatwares. Can someone please give ...
2
votes
1answer
63 views

Is it possible to update from Android 4.2 to 4.4 without disturbing the bootloader?

I have, for example, downloaded an update from android 4.1 to 4.2. All it consisted of was 10 new system apps, 5 libraries, 3 fonts, and a new bootanimation. What I would like to know is if an update ...
6
votes
1answer
1k views

Bootloader wont unlock on Google Pixel 2 (G011A)

I'm trying to root my Google Pixel 2 but I can't get the bootloader unlocked. The phone is a renewed and unlocked international version, model number G011A. From the bootloader screen, and connected ...
1
vote
0answers
92 views

What can be done with a phone that has an encrypted bootloader

I am trying to get a rooted android phone set up for reverse engineering purposes. I tried to root two separate phones (SM-G925A and a Google Pixel 2) but they both turned out to have locked (meaning, ...
1
vote
0answers
74 views

How to debug the kernel if the device only boot to fastboot [closed]

I am tring to compile the kernel source provided by the manufacture of my phone(OPPO PCCM00 precisely). Since it's not "well-opensourced", I changed quite a lot to make sure the kernel would ...
2
votes
0answers
138 views

What is the format for an Android ROM?

I downloaded a ROM for a Xiaomi phone to see what's inside. It's a zip file, that has these inside: boot.img META-INF system.new.dat.br vendor.patch.dat ...
2
votes
1answer
384 views

Unlocking bootloader for vivo Y12

I have enabled oem unlock and usb debug from settings. I am using vivo fastboot tool. And after entering fastboot menu, I tried the code fastboot bbk unlock_vivo. C:\Users\dell\Desktop\...
1
vote
0answers
40 views

What creating bootloop when flashing TWRP? [duplicate]

I follow this XDA tutorial to flash TWRP and rooting Samsung Galaxy J250F. However, after flashing TWRP via Odin, the phone only boots into recovery, not system. Even factory reset or empty the misc ...
3
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0answers
66 views

Locking bootloader after vendor build change

So, I have a Mi 10 Lite with the MIUI 12 EEA, and it's not the stock ROM but the Vodafone build (QJIEUVF). As there's the new Android 11 update coming, I'd like to have that and not wait for Vodafone ...
0
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0answers
23 views

Help - MotoG8 stuck on bootloader screen after toddler messing around with phone

As above, my daughter was messing around with my wife's phone and now the phone is stuck on this screen: Bottom 3 lines read: Power low oem_locked Connect usb data cable I've tried both holding ...
0
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1answer
583 views

Boot loop after messing with the smallest width option in developer options. (Redmi 5 plus)

so I was bored and I decided to check some developer options to see what they can do... I found this option called 'smallest width', at first I set it from 392 to 100 and it automatically set itself ...

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