Hi, i've unrooted my samsung tab 4 8.0 (sm-t330) so that I can update to 5.1.1. So I did, updated and now that OTA update has locked the bootloader. So I have tried the ./adb reboot bootloader. When I typed that into terminal, it turned off my tablet, then booted into this odin mode and said "Downloading... Do not turn off target!! I then cannot use the command ./fastboot oem unlock. I dont know what is wrong. Please help.
Related
PROBLEM SOLVED! I used another pc, my usb ports were the problem! I recently got my Nexus 7 (2012), wi-fi only , I unlocked it's bootloader, installer TWRP recovery, and rooted it. For all these operations i used the N7 toolkit , because back then, I was a noob. The rooted tablet (4.2.2) worked Perfectly! But, after about 3 months, it's "volume down" button stopped working. I rebooted it, but it went in bootloader, instead of normal system. So I just select "Start" and it was in Safe Mode! OK, my "volume down" didn't work in Safe Mode (and bootloader mode) neither! And every time I reboot it, it goes to bootloader! I thought that it was a software problem confused , so I began flashing a new ROM. I didn't want to use the toolkit because everyone says that it's bad . I downloaded AndroidSDK, I re-downloaded the ADB and Fastboot drivers, and I downloaded the newer version of the bootloader (4.23, .img) . Tablet was already in bootloader and I connected it to the PC. In platform-tools folder I ran the "fastboot devices" command, and It was able to see it . So I copied the bootloader img to the same folder, and I ran "fastboot flash bootloader bootloader-grouper-4.23.img" . Then I rebooted it into bootloader again. IT WORKED! But, it didn't solve the "volume down" problem. My rooted 4.2.2 and TWRP were still on the system. Everytime I power off the tablet, and then hold the "Power" button, it goes into bootloader. It was that button issue causing that. Then I decided to take it to the service (same place where I bought iw the unloct) , but I couldn't because if they saked bootloader, non-stock recovery and the root, the wouldn't accept the warranty . I decided to download the latest 4.3 stock android, and stock recovery, flash them, and lock the bootloader. I downloaded 4.3 stock from google's official site, (nakasi-jwr66y) and I used the flash-all.bat command that came with it.
.bat command looks like this:
PATH=%PATH%;"%SYSTEMROOT%\System32"
fastboot oem unlock
fastboot erase boot
fastboot erase cache
fastboot erase recovery
fastboot erase system
fastboot erase userdata
fastboot flash bootloader bootloader-grouper-4.23.img
fastboot reboot-bootloader
ping -n 10 127.0.0.1 >nul
fastboot -w update image-nakasi-jwr66y.zip
echo Press any key to exit...
pause >nul
exit
I ran it. It successfully did the oem unlock (it was already unlocked) , all the erase commands, and flash bootloader command. But it was stuck on
"fastboot -w update image-nakasi-jwr66y.zip" . It stays steady for about 30secs , and than it says
"sending 'system' (x-kb)"
After some time it just says Data transfer failure(too manly links) ...
I tried the same process billion more times, but same error :/
I tried
-Re-downloading and installing the drivers
-Changing the usb ports, and microUSB cables,
-Restarting the pc (of course)
-Re-downloading the nakasi-jwr66y
-Downloading the twrp recovery (it successfully flashes it)
-Re-downloading the whole SDK
But it DOESN'T WORK? What should I do? Is the volume-down issue hardware or software ?
Sorry for my bad English :////////
P.S. What is the difference between "fastboot flashall" and "fastboot update" ?
I stupidly flashed a wrong file and lost access to twrp and root. But that is cool I got back ups etc because I was in the process of rebuilding anyway
Symptoms :
If I restart phone it'll get stuck on logo until
Fastboot continue
OS loads up but....
No root and no access to bootloader, can not fastboot flash recovery recovery. Img
Failed Device is locked
Cannot flash anything onto it seems I am locked out an unlocked then locked bootloader without root??
See attachments for more details
Is there a way out of this mess, lol what have I done :crying:
Just to clarify I have adb enabled, cmd promt and terminal have access to it under abd /fastboot devices = id, I just can't flash anything so is there another way to get root and install twrp if I can't flash?
I can't seem to get ADB or Fastboot working in Recovery or Download Mode.
In recovery if I select the option 'install update from adb sideload' then my device shows up is adb (not useful to me right now) but not in fastboot, which is what I need to execute the 'fastboot oem unlock' command (is that the right way? I've already enabled oem unlocking in settings). I can flash files via Odin, do I need to flash twrp or something?
Any help would be appreciated!
EDIT:
So it turns out that the toggle 'allow oem unlocking' unlocks the bootloader. The reason i thought it didn't was because when I flashed the cf-auto-root file I got stuck in a bootloop. Turns out I had to flash the file, then go into recovery, then reboot which solved my problems.
Samsung devices do not support fastboot mode.
The device is already OEM unlocked. You should be able to boot into Download or Odin mode and flash pretty much anything.
ODIN only
Hello,
I have a galaxsy s5 906k and I've been reading on how to unlock the bootloader as I'm trying to install Remix OS and it seems I've come across a lot of misinformation.... and if possible can someone tell me what exactly I need to unlock the bootloader, as I can't find a list of the appropriate tools? Do I need twrp for my specific device?? Some have said yes and some no.
My phone is already rooted.
Also post unlock bootloader question, can I use the 900k rom from remix to install on my 906k?
EDIT**
I can only boot into download mode, not fastboot mode. adb devices returns the device, but fastboot devices returns nothing. Tried adb reboot-bootloader`and it just shows waiting for any device.
These all boot into download/odin mode!!!!!!
adb reboot download
adb reboot bootloader / adb reboot-bootloader
fastboot oem unlock
fastboot flashing unlock
Only one that boots into recovery mode! Then I go to Reboot to bootloader and it comes back to recovery mode!!!!!!!!!!
adb reboot recovery
I Booted The Tv To Bootloader Mode By ADB command And Run,
fastboot oem unlock and fastboot flashing unlock,
It Shows Wiping USERDATA.
Then I rebooted but it stuck on.
Your divice can't be checked for corruption
Please Relock bootloader.
It stays for 5-6 seconds and then tv go to standby
washimh said:
I Booted The Tv To Bootloader Mode By ADB command And Run,
fastboot oem unlock and fastboot flashing unlock,
It Shows Wiping USERDATA.
Then I rebooted but it stuck on.
Your divice can't be checked for corruption
Please Relock bootloader.
It stays for 5-6 seconds and then tv go to standby
Click to expand...
Click to collapse
You have to reboot into recovery mode