Cant install TWRP or Magisk - Samsung Galaxy S9+ Guides, News, & Discussion

I tried to install both using FASTBOOT and even Sideload could not get them to work I then tried these tools such as all in one kit, 1clickroot and few others don't remember the names. I don't have OEM unlock yet. I also bought off GOOGLE and unlocked.

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Help unlocking bootloader

I am trying to unlock the bootloader of my oneplus one, when using the oneplus one toolbox ive put phone into fastboot and clicked unlock bootloader but it just reboots my phone and does not change anything, ive tried doing fastboot oem unlock through cmd it says its successful but still does not change anything???
i realized that why nothing was changing was because it was already unlocked, now i have flashed supersu but i dont have root access when i open titanium it says that i can't get root access???
Did you install TWRP? You need that as well to get root.
Stop using the toolbox and do things manually, that's probably what's causing your problems. There's a guide in my signature.
Transmitted via Bacon

[Q] "Fastboot oem unlock" Does nothing.

I have owned this phone for about 5-6 months now and have never unlocked the bootloader. I know I probably should of done that when I got it but for some reason I have been able to flash TWRP, Root the phone, and install custom roms without wiping the phone no problem. I am currently on Paranoid Android 4.6 Beta 6 and TWRP 2.8 but I wanted to go back to CM11S, and I thought maybe it's time that I unlock the bootloader. I have installed the correct drivers and when I type "fastboot oem unlock", the Command Prompt said "finished in 0.06 seconds", I then rebooted and nothing happens. I also tried a Toolkit to unlock it but that didn't do anything either. Can anyone help? I don't want to Hard Brick my phone.
Thanks
It sounds like your bootloader is already unlocked.
Try running
fastboot oem device-info
to see what it says. Post your results here and somebody should be able to help you.
The right command is:
Code:
fastboot oem device-info
Transmitted via Bacon
check this
Matt7262 said:
I have owned this phone for about 5-6 months now and have never unlocked the bootloader. I know I probably should of done that when I got it but for some reason I have been able to flash TWRP, Root the phone, and install custom roms without wiping the phone no problem. I am currently on Paranoid Android 4.6 Beta 6 and TWRP 2.8 but I wanted to go back to CM11S, and I thought maybe it's time that I unlock the bootloader. I have installed the correct drivers and when I type "fastboot oem unlock", the Command Prompt said "finished in 0.06 seconds", I then rebooted and nothing happens. I also tried a Toolkit to unlock it but that didn't do anything either. Can anyone help? I don't want to Hard Brick my phone.
Thanks
Click to expand...
Click to collapse
hello ..
i have oneplus 64 that the Tampered was true and unlock false.
i have original recovery . that i cant run not signed zip
i tried everything even install coloros ( and its failed)
finaly after alot of hours the soultion very simple
1.install throw adb sideload the signed rom ... https://www.androidfilehost.com/?fid=95747613655046106
2. its take you to factory rom
3. after that u can unlock your oneplus with fastboot oem unlock
thanks
timmaaa said:
The right command is:
Code:
fastboot oem device-info
Click to expand...
Click to collapse
Thanks, edited to fix.

[Q] ColorOS and installing a custom room

Hello everyone, I was in China recently, and bought my OPO there. Therefore, it came with colorOS.
I wanted to change it to the rom to SlimSaber. Unfortunately, I've been unable to do so.
To unlock the bootloader I'm using this set of instructions:
[GUIDE] OnePlus One - How to Unlock Bootloader, Install Custom Recovery and Root - http://forum.xda-developers.com/showthread.php?t=2788632
I think my problem is while unlocking the bootloader. I get into fastboot mode, and using the android-sdk devices I'm able to get the serial number of the phone.
But, when I run the fastboot OEM unlock, nothing happens. Everything should be erased, right? Well, that doesn't happen. After that, I enable the USB debugging, but after, when I'm supposed to disable the 'Updater recovery with system updates' I simply don't see that option.
Can anyone help me? Do you need any more info?
Tanks in advance;
Qskara said:
Hello everyone, I was in China recently, and bought my OPO there. Therefore, it came with colorOS.
I wanted to change it to the rom to SlimSaber. Unfortunately, I've been unable to do so.
To unlock the bootloader I'm using this set of instructions:
[GUIDE] OnePlus One - How to Unlock Bootloader, Install Custom Recovery and Root - http://forum.xda-developers.com/showthread.php?t=2788632
I think my problem is while unlocking the bootloader. I get into fastboot mode, and using the android-sdk devices I'm able to get the serial number of the phone.
But, when I run the fastboot OEM unlock, nothing happens. Everything should be erased, right? Well, that doesn't happen. After that, I enable the USB debugging, but after, when I'm supposed to disable the 'Updater recovery with system updates' I simply don't see that option.
Can anyone help me? Do you need any more info?
Tanks in advance;
Click to expand...
Click to collapse
Issue this command:
Code:
fastboot oem device-info
What does it return?
Transmitted via Bacon

Downgrade

So I updated my FRD-L04 to the Nougat Beta, and while I was following the instructions and Flashesd the Update. For some reason I lost TWRP and cant boot into recovery, my bootloader is unlocked.....however in developer options OEM Unlock is grey out and i cant enable it.... So when ever i try to run a command through fastboot it says is not allow.... and when i try ti re-lock the bootloader i get FAILED (remote: root type is risk)... I try to roll back package from Huawei website but that also fails..... Now i dont know what to do.
I am in the same boat. Did the new beta via twrp. My usb debug was greyed out but i was able to to get it to turn on for short moments.
I have now lost twrp and now the phone wont even boot the the Android 7 beta os!
I have fastboot but when i try to fastboot flash system or cust they both fail. My bootloader is still unlocked tho.
edit: I downloaded the beta flashable zip and the update that is seperate. I took out the boot recovery cust and system from them and was able to flash them via fastboot. The phone now boots back to the android 7.0 beta. Phew!!!!!
Now to attempt downgrade to 6.0 adn get twrp back
You should look for a downgrade package
Since you have lost TWRP, I think you will have to reinstall it and root your device again.
DarkGuyver said:
Since you have lost TWRP, I think you will have to reinstall it and root your device again.
Click to expand...
Click to collapse
I tried thta multiple times, but when i flash recovery it says its not allow, again i think is because i can enable oem unlock on settings
You should look for a downgrade package
CronaMell said:
You should look for a downgrade package
Click to expand...
Click to collapse
Like I mention on my initial post I have already tried the downgrade package..but it does not work. I can't enable oem unlock since is grayed out ... my boot loader is unlock and I can't use the phone but NFC Bluetooth etc does not work.. I even tried to flash the downgrade package recovery and boot image through fast boot but it's not allow since I can't enable oem unlock...
I'll research a bit and see If I can find something

Unable to Unlock Bootloader (help!)

I've tried online guides to unlock bootloader, but messed up in some point and now I'm stuck.
1st. Download indepth test and reboot to bootloader within the app.
2nd. Tried adb devices successfully
3rd. Fastboot oem unlock nor Fastboot flashing unlock run (output: fastboot oem unlock failed "remote unknown command")
4th. Decided to make a factory reset (just becase I had to make an stupid desition)
Now I can reboot into fastboot again, because in depth test app won't install anymore. Installer says "Installation failed -An app with the same signature has already been installed"
I've unsuccessfully tried to flash stock rom from recovery but thein depth test seems to be "installed" without front user interface, also fasboot reboot bootloader get stuck in waiting for any device.
Can someone have a solution I already tried anything that comes to my mind.
Thanks.
I was able to solve the problem installing extractly the same apk.
The "fastboot oem unlock" dont work for me
What work on me 5pro is "fastboot flashing unlock"
Then flash twrp and vbmeta
To relock bootloader "fastboot flashing lock"
Source https://forum.xda-developers.com/realme-5-pro/how-to/bootloader-unlock-tutorial-t3985003
Other, might helpful source:
https://forum.xda-developers.com/realme-5-pro/development/rom-pixel-experience-t4053357

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