Hello...
I am looking for a working way to root my SM-T555
The device is running android 7.1.1;
base ver. "T555XXU1CQHA";
build ver. "NMF26X.T555XXU1CRG1";
Samsung experience 8.5;
Android security patch August 2017.
So far, the several attempts I made using every T55X related software I found in this website have been unsuccessful.
It would seem that the rooting software available is for "Marshmallow only", thus not Nougat specific,
though I read some comments stating that the TWRP made for MM worked on Nougat too and, after that, Magisk would/could do the job...
So I gave it a try but, after installing the recovery, my tablet got stuck every time: refused to boot normally
and if I turned it off, long pressing the power key, I couldn't turn it on again as if it was bricked.
Every time I had to re-start it in download mode and re-flash the original stock rom with Odin in order to have it working again.
On top of that, the "OEM unlock" key is not present in the developer mode list: none of the "date changing tricks" I found around the web seems to fit this model.
I am inclined to believe this "might" be the mother of my problems in rooting the device though, supposedly, the patches were not for Nougat, anyway...
The developer options page, once activated, can only be "turned off" ("greyed out") but cannot be deactivated;
while, on other devices, if you turn it off the page usually disappears after rebooting then you have to tap 7 times the build version, again, in order to make it appear.
I never had problems in rooting any of the phones and tablets I have /had, including an SM-T819 running Nougat 7.1.1,
thanks to the great job done by the coders in this community to whom I would like to express my appreciation for what they do for the benefit of us all.
But this thing seems to reject everything I throw at it and it's been the most stubborn "phone like object" I ever fought with.
So far I am the one loosing the fight... I wish some of you guys could give me the means to defeat it.
Thanks in advance to whoever may be available to help me out.
Flash TWRP, then install Magisk in TWRP.
V0latyle said:
Flash TWRP, then install Magisk in TWRP.
Click to expand...
Click to collapse
thanks for your reply.
maybe my post was too long and boring so you didn't read it all
Of course I already tried the solutions posted in the page you suggested but they did not work.
not the autoroot files, not the recovery, etc...
I quote: "after installing the recovery, my tablet got stuck every time: refused to boot normally
and if I turned it off, long pressing the power key, I couldn't turn it on again as if it was bricked.
Every time I had to re-start it in download mode and re-flash the original stock rom with Odin in order to have it working again."
If there is a TWRP file specific for my Nougat version available I'd be happy to give it a shot
endlessquest said:
thanks for your reply.
maybe my post was too long and boring so you didn't read it all
Of course I already tried the solutions posted in the page you suggested but they did not work.
not the autoroot files, not the recovery, etc...
I quote: "after installing the recovery, my tablet got stuck every time: refused to boot normally
and if I turned it off, long pressing the power key, I couldn't turn it on again as if it was bricked.
Every time I had to re-start it in download mode and re-flash the original stock rom with Odin in order to have it working again."
If there is a TWRP file specific for my Nougat version available I'd be happy to give it a shot
Click to expand...
Click to collapse
Did you follow a guide when flashing TWRP? Did you unlock your bootloader?
You need to be clear and concise in your posts as yo what you did and how.
V0latyle said:
Did you follow a guide when flashing TWRP? Did you unlock your bootloader?
You need to be clear and concise in your posts as yo what you did and how.
Click to expand...
Click to collapse
of course I did follow the guide by the book. also, the recovery appears to be installed properly, Odin showing a nice green PASS sign, but it doesn't work anyway
now about unlocking the bootloader, as I mentioned in my first post:
"the "OEM unlock" key is not present in the developer mode list: none of the "date changing tricks" I found around the web seems to fit this model.
I am inclined to believe this "might" be the mother of my problems in rooting the device"
every time I had to re install the system, so there clock want back to zero. Maybe I should be waiting for the allotted number of days to pass on order for the OEM unlock key to appear...
but before my first attempt to root the device, almost one month was past and the OEM unlock key wasn't there, notwithstanding...
I hope there was a chance that the bootloader was already unlocked...
to be concise (schematic):
tablet in download mode
untick auto reboot in Odin
AP loaded with "smt550_cf-autoroot.tar"
flash with Odin, OK, green sign PASS
reboot manually home+volume down+power,
then switch to volume up when screen becomes black
the Samsung logo appears and stays there indefinitely
So I turn the device off, long pressing the power key
then I try and turn on the tablet but does not turn on anymore,
not even pressing the power button for 30 second
then I press home+volume down+power again
to enter download mode and reinstall stock rom
(the same happens with
sm-t550_p550_p555_cf-autoroot.tar
or twrp_3.0.2-1_sm-t550_mm_7816.tar,
I also tried
twrp_3.1.1-1_sm-t355_251117
remark: none of them mentions T555 nougat)
Put your tablet in Download Mode and take a picture of the text at the upper left of the screen.
V0latyle said:
Put your tablet in Download Mode and take a picture of the text at the upper left of the screen.
Click to expand...
Click to collapse
What process did you follow to unlock your bootloader?
Stop trying to use Autoroot. Let's figure out what we need to do to get TWRP on your device. Once we do that, you can flash Magisk in TWRP for root.
Please read this guide, sections 1 through 4 (don't worry about the GSI stuff) and tell me what you have or have not done.
ok, I wasn't able to do this:
Unlock Bootloader
Enable Developer Options and turn on OEM Unlocking
OEM Unlocking is missing in the list, as I mentioned in my previous posts
I tried the date change trick but it didn't work
endlessquest said:
ok, I wasn't able to do this:
Unlock Bootloader
Enable Developer Options and turn on OEM Unlocking
OEM Unlocking is missing in the list, as I mentioned in my previous posts
I tried the date change trick but it didn't work
Click to expand...
Click to collapse
This is the first step. You cannot flash custom or modified images if the bootloader is locked.
Connect to the Internet and check for updates in system options, then check Developer Options again.
I did that step too, several times:
the system found an update available
the first times I cancelled the download
then I downloaded the update without installing it
then I tried and installed it
no result at all the attempts: the OEM Unlock key does not appear in developer options
endlessquest said:
I did that step too, several times:
the system found an update available
the first times I cancelled the download
then I downloaded the update without installing it
then I tried and installed it
no result at all the attempts: the OEM Unlock key does not appear in developer options
Click to expand...
Click to collapse
Has it ever appeared before?
V0latyle said:
Has it ever appeared before?
Click to expand...
Click to collapse
it is the first time I work on this specific device, so I couldn't tell: so far I couldn't find the OEM unlock option in the list
it never happened before on any of the several devices I have rooted in my life,
included another Samsung tablet SM-T819 running Nougat 7.1.1: the option was right there and all I had to do is tick it.
I used fastboot for other brands
I wish there was a way to use fastboot to unlock the bootloader on Samsung
if there is any I don't know it
adb is working, but when I give the "adb reboot fastboot" command, the tablet enters the download mode and fastboot does not see the tablet anymore from the computer
endlessquest said:
it is the first time I work on this specific device, so I couldn't tell: so far I couldn't find the OEM unlock option in the list
it never happened before on any of the several devices I have rooted in my life,
included another Samsung tablet SM-T819 running Nougat 7.1.1: the option was right there and all I had to do is tick it.
I used fastboot for other brands
I wish there was a way to use fastboot to unlock the bootloader on Samsung
if there is any I don't know it
adb is working, but when I give the "adb reboot fastboot" command, the tablet enters the download mode and fastboot does not see the tablet anymore from the computer
Click to expand...
Click to collapse
Samsung devices do not have a fastboot mode.
Since this is a Snapdragon device, it probably cannot be unlocked, especially if it was marketed in the US.
Only Exynos and international Snapdragon devices can be unlocked, unfortunately.
V0latyle said:
Samsung devices do not have a fastboot mode.
Since this is a Snapdragon device, it probably cannot be unlocked, especially if it was marketed in the US.
Only Exynos and international Snapdragon devices can be unlocked, unfortunately.
Click to expand...
Click to collapse
actually I am in Rome, Italy so I am quite positive it was marketed here...
is there a way to know for sure whether or not it is international?
the Samsung SM-T819 I am writing from has a snapdragon chip
but I had no problem unlocking/rooting it,
I bought both the devices here in Rome
now that's a mystery...
endlessquest said:
actually I am in Rome, Italy so I am quite positive it was marketed here...
is there a way to know for sure whether or not it is international?
Click to expand...
Click to collapse
Usually the model number is a good indication with phones - the G908U vs G908N for example, but I don't see that being the case here
Have you tried signing into a Samsung or Google account on the device before checking for updates and looking for OEM Unlocking?
V0latyle said:
Usually the model number is a good indication with phones - the G908U vs G908N for example, but I don't see that being the case here
Have you tried signing into a Samsung or Google account on the device before checking for updates and looking for OEM Unlocking?
Click to expand...
Click to collapse
I did that too...
on a freshly installed rom:
I connected the internet thru wireless
signed into my Google account
completed the tablet configuration, etc
then I went and enable the developer options
no OEM Unlocking yet again...
endlessquest said:
I did that too...
on a freshly installed rom:
I connected the internet thru wireless
signed into my Google account
completed the tablet configuration, etc
then I went and enable the developer options
no OEM Unlocking yet again...
Click to expand...
Click to collapse
You manually checked for an update too?
Did you try disconnecting from the Internet, disabling network time, and manually setting the time ahead 1 week?
Related
Today I got my new Xiaomi 3S (4G, 3GB RAM, 32GB ROM) played around with it a little bit and disabled all Google Apps to be found on the phone Except Google Services that couldn't be disabled.
Connected it via WLAN and got promptly OTA offered. I didn't wrote down the MIUI and Android builds but remember manufacturing date August 2016, MIUI was version 7 something.
After the updates where downloaded I was asked to reboot the device what I confirmed and the updates where installed. Now the phone is stuck with a black screen and white "MI Powered By Android" on it.
Nothing changed since 3 hours now. Any idea what to do?
Phone can't even be turned off/does not recognize hardware button presses.
This is a known issue, disabling google apps causes issues . You should now try following this guide http://en.miui.com/thread-327861-1-1.html
timbohobbs said:
This is a known issue, disabling google apps causes issues . You should now try following this guide http://en.miui.com/thread-327861-1-1.html
Click to expand...
Click to collapse
Thanks a lot for your reply, tried it already yesterday while the Phone was in endless boot queue without luck, hence the non working buttons update.
But today after the battery was emptied over night I got into the recovery mode menu!
Just a question before I go ahead to follow the step by step guide:
Though I read this thread/vote I'm non the smarter. If I want to go google free, Xiaomi Global or Xiaomi EU ROM?
I'd also use XPosed framework with XPrivacy again. IMUI seems nice, is CM 13 the only alternative for non google/XPosed/Xprivacy then?
I currently have a 3s prime but it's a present for my son so haven't flashed anything, just take ota's. I have read quite a bit though and you should maybe just check the rom threads for roms with separate gapps packages, that way you could remove what you want prior to flashing. Don't know about xposed but again, ask in the rom threads. [emoji106]
Update: No success, when going into recovery mode (pushing volume up and power button) and choose download mode the phone will just reboot into endless boot-loop.
For people with the same problem (after disabling google apps) maybe they can get their device back to work with this http://en.miui.com/thread-378963-1-1.html
The only Way to get you phone back is to use a Deep Flash Cable i think
I was able to solve the problem by installing a fastboot-rom. Pressing power button and volume + for around 20 seconds got me into recovery menu.
Than I was just following a guide to install an original MIUI rom on devices with locked bootloader.
well to get to download mode you can enter "fastboot oem edl" without the "" and you will go to edl from fastboot mode. HOPE THIS HELPS
timbohobbs said:
This is a known issue, disabling google apps causes issues . You should now try following this guide http://en.miui.com/thread-327861-1-1.html
Click to expand...
Click to collapse
Now I know why my phone went into a bootloop. Won't disable any Google apps anymore.
Disabling any apps in MIUI8 will cause the phone cannot reboot... you can format everything through a recovery (have to flash manually because it doesn't come with recovery), or flash a new ROM through fastboot mode (if you have unlocked your bootloader), or send back to service center to claim warranty (if there is any service center in your area), or throw it and buy a new one
abhi0005 said:
well to get to download mode you can enter "fastboot oem edl" without the "" and you will go to edl from fastboot mode. HOPE THIS HELPS
Click to expand...
Click to collapse
I have same problem but in my case developer option is locked so oem is off and thus port COM10 is not being shown in Miflash, also fastboot oem edl says device is locked, oem edl is not allowed. In my case 3s prime went into bootloop while Iwas using youtube. Please help!!
Hello XDA
As title say, I 'm going share my experience in this thread.
History
I purchased this device almost 8 month back.Purchased from a local store.Was very smooth and i was satisfied with the performance.Battery was good.Got regular update and these updates are from google,so why not install it,right?Then this Android N came,and i was so happy.7.0.0 was good.Then the nightmare 7.1.2 came.Phone started to lag continuously,Battery drained too much.But I was like Okay.May be this will fixed in new update.Then suddenly one day my phone was stuck.Not booting.Stucked at Google.I understood that phone already booted and fingerprint was too working but it showed nothing on display just black light.I was afraid as i didn't purchase it from Google Play or any authorized seller.So no warranty or chance of having replacement.So I started searching about this issue and found not only me many people are facing this.But there are no proper guideline or solving this issue.Tried everything and ended up with Locked Bootloader Irony!
Journey
As i never try to mess with my phone because it was Nexus 5x! So i never touch OEM or try to unlock the bootloader.So i tried to access stock recovery,But Alas! in recovery Volume up and down wasn't working.So I couldn't wipe or factory reset.So Now ended up with :
1.Locked Bootloader
2.Locked OEM
3.Recovery Stuck
Googled and found many solutions but none of them came to solve my issue.So i thought why not flash stock rom.But HOW! Cause fastboot only work with unlocked bootloader.And you can't unlock bootloader when your OEM is locked and you can't unlock it with fastboot.It can be only unlocked from developer option only.GOD!
Now I have only 2 options left:
1.Fastboot mod where no functions working
2.Download Mod (This will save you)
Now fastboot option is out and only download mod option is available.So what can i do with Download Mod?
LGUP TOOL helped me.Downloaded a tot file for Global version (LGH791) and flashed it and stucked at google logo and in recovery too.But next time i flashed the same file in a different way.Ok here it is:
1.Drivers are important here.I'm using windows 10.I have adb and fastboot and Lg drivers.Workplace okay.
2.Opened device manager and change the com port of Android phone 3 to 41. Port Changed!
3.Connected my phone to pc using 3rd party cable (Careful here,try to use original cable.) and entered into download mod and.
4.Opened LGUP Tool ,checked REFURBISHED mod,checked BIN file and select the tot file downloaded before.And quicky close it.(No need to click start)
5.Then again opened lg tool and click start.(BIN Checked and it showed the previously selected tot file).No need add anything new this time,just open and click START.
6.Rebooted and again stucked at Google screen.But wait! recovery is working.Pressing and holding volume up button for a while then a android logo with red cross inside will come up.Now holding power button and volume down button at the same time,Recovery will show and menu is working.Great!
7.Now Wiped cache and factory reset.And after that selected Apply update from Adb sideload
8.My device was connected to pc from the beginning,right? Now i downloaded a file previously called bullhead-ota-opp2.170420.019-c449d2bb.zip from Google Nexus 5x OTA update page.
9.In Adb folder,copied the file and named it ota.zip.Opened a command prompt using shift+right click in the folder.Phone was on Adb sideload mode.Typing this command adb sideload ota.zip
10.This took more than 8-9 minutes to finish.After flashing and phone rebooted.WOW
11.Couldn't believe my eyes.The OTA update was about Android O.I quickly enabled the developer menu and made oem unlcocked and usb debugging on.Boot into bootloader and unlock bootloader with this command fastboot flashing unlock
12.Now bootloader is unlocked and i flashed TWRP recovery for future need.
13.Rebooted the phone and after using for 1 minute the phone freezed again
14.This is the end of the story for today.
Planning
I'm thinking the OTA update was the problem.Now I'm downloading 6.0.1 version.And will do a clean install.Let's see what happens next.
Any kind of help is appreciated.If you think there is something i'm missing here then please suggest.
And Thanks to XDA.I got all these helps from here.Will update the post tomorrow.
You downloaded Android O Developer Preview. Final OTAs are here:
https://developers.google.com/android/ota
Just try flashing newest Factory Image via fastboot, but don't forget to flash TWRP back:
https://developers.google.com/android/images
TBH I NEVER thought this phone will be dead by hardware failure all of a sudden, I dont mind another few hundreds bucks but the problem now is the fking data within it.
Cant even pass google logo if you choose Recovery Mode
GG LG, well played
I have a 16gb variant dead....same issue like urs .....can i use the same lgh791 tot file?... in fastboot it says lgh791 16gb
usefully
usefully
I STRONGLY recommend that the original post is corrected to change "Download mod" to "Download mode" in all of its four occurences.
Same for one ocurrence of "Fastboot mod".
It is horribly confusing as it is, as calling them "mod" implies some modification you have to apply to the phone (be it software or hardware).
same of my expirience, flash 4CoreOreo..
my nexus 5x now is fully working
the_uker said:
I STRONGLY recommend that the original post is corrected to change "Download mod" to "Download mode" in all of its four occurences.
Same for one ocurrence of "Fastboot mod".
It is horribly confusing as it is, as calling them "mod" implies some modification you have to apply to the phone (be it software or hardware).
Click to expand...
Click to collapse
I suppose that makes sense. Then again, when an instruction is telling you to boot into download mod.....using common sense I'm gonna understand that's a typo and they meant download mode. But you're right, for some folks that may be a bit of a challenge. Common sense isn't as common as it was when I was young.
And the links?
I'm brazilian and i'm having a hard time to find the links to download stuff. Mine is dead and bootloader blocked. The tutorial seems to work but i can't understand well
Interesting. Thanks
Hello,
I'll try to be as specific as I can with my steps, so sorry If you don't like the format (or if its not even allowed), it's the best way I can explain step by step everything I did.
so... what do I want to do? Simply install some custom ROM to my SM-G570M so I can get rid of all the bloatware.
What's stopping me from doing it like I did it before? well...
>I flashed last version of TWRP via Odin
>Download mode (V- + Power + Home), Odin, the flash itself, everything went well, at least it appeared so
>When trying to load into it (V+ + Power + Home), I get a blue screen with android's logo and the words "Instaling system update"
>Immediately after I get another screen, this time android's logo is laying down, with a yellow ! above and the words "No command"
>Waiting a few seconds will get me to Android Recovery (the clasic move with Volume select with Power menu) with this in it:
#fail to open recovery_cause(No such file or directory)#
#Reboot recovery cause is [UNKNOWN]#
No support SINGLE-SKU
Click to expand...
Click to collapse
>I don't really know what to do, TWRP is nowhere to be seen
>I factory reset my phone (I don't really know why)
this is when things get interesting (that is, frustrating af)
>Phone boots fine, but OEM Unlock is not available. Not even greyed out, not even locked. It's not there at all
>I Google about it and try about... 50 different "solutions"
>Change system date to 7+ days to the past and trigger a false Update lookout, restart... nothing
>Triggered Update lookouts twice to make the sure the phone "knows" I searched for it 10 days ago and today... nothing
>I Literally write the steps down and start superpermutating that **** for around two hours... nothing
>Some other random non-Samsung, non-my-phone-specific "solutions"... nothing
>I come across adb (never used it before, never had to)
>It claimed I could do the OEM Unlock from Windows cmd
>I download adb 15 seconds installer, adb and fastboot drivers (both), I already had Samsung specific USB drivers, everything I need
>open CMD and do adb devices
>see my device there, nice
>adb reboot bootloader
>it boots there, n i c e
>fastboot devices
>... nothing
>fastboot device, maybe it was without the s
>stuck in waiting for device
>close everything, start again
>this time I do directly fastboot OEM unlock
>waiting for device
here I'll explain what I saw in Device Manager in all my adb odyssey:
Drivers are recognized in its normal state (that is, phone connected, no dev ****, just using it) with its full name (Samsung J5 Prime bla bla bla). Besides that I have some Samsung USB Drivers showing as modems? idk why. Once I change my phone state (let's say, I do adb reboot bootloader) drivers completely dissapear. Not even showing as *Unrecognized !*, no "Android Device 1.0". It's not there at all. Only thing I see is is the usb modems? drivers.
And yes, I used every USB Port I have, the only thing it changes is a #n besides the modem drivers.
I did read you have to install drivers twice? Once in each state? I did so and nothing.
I did "Added Legacy Hardware", where I saw different ones: ADB Interface, Samsung ADB Interface, Bootloader Interface, etc. Added every single one of them, updated them (I even got the Google USB thing, it did nothing) Sometimes it would bring some error (Can't do that right now or something like that), sometimes "It's already the best we have", but still not regognizing it in cmd fastboot devices.
I also superpermutated every step I could, even doing things completely illogical. I didn't care, I stayed awake until 9AM doing it... and nothing
I did noticed, at around 5am, half asleep, that my "bootloader" window (in my phone) was... not... really... a bootloader? whenever I would adb reboot bootloader it would get me to the same Download Mode I would get by pressing V- + Power + Home. I dismissed it, not only it was really late, It could have just been a normal misunderstanding... you know, language barriers and such (I'm not english native, so I'm constantly reading things in practically two languages, maybe *Bootloader* and the *DW Mode* where actually the same and people are arbitrarily obtuse, I thought) but it still bothers me nonetheless.
I also tried, since, you know, all I want is a custom ROM, to play with Recovery Mode adb sideload? But I would always get some error 21 and other I didn't really catch.
That's my problem(s). I don't really know what to do, and I don't want to wait seven days (or more, because I read some people waiting for weeks) to have the actual OEM Unlock option in my Dev Options.
Can I get a hand with this? Is my bootloader even active? Can I even do OEM unlock in my current state? did I miss a driver, among the 100+ I downloaded even from dubious webs? Never worked with phones before so I'm practically new on this, last time I touched android I did perfectly flash TWRP through Odin and did everything from there.
please
pretty please
Nezvanova said:
Hello,
I'll try to be as specific as I can with my steps, so sorry If you don't like the format (or if its not even allowed), it's the best way I can explain step by step everything I did.
so... what do I want to do? Simply install some custom ROM to my SM-G570M so I can get rid of all the bloatware.
What's stopping me from doing it like I did it before? well...
>I flashed last version of TWRP via Odin
>Download mode (V- + Power + Home), Odin, the flash itself, everything went well, at least it appeared so
>When trying to load into it (V+ + Power + Home), I get a blue screen with android's logo and the words "Instaling system update"
>Immediately after I get another screen, this time android's logo is laying down, with a yellow ! above and the words "No command"
>Waiting a few seconds will get me to Android Recovery (the clasic move with Volume select with Power menu) with this in it:
>I don't really know what to do, TWRP is nowhere to be seen
>I factory reset my phone (I don't really know why)
this is when things get interesting (that is, frustrating af)
>Phone boots fine, but OEM Unlock is not available. Not even greyed out, not even locked. It's not there at all
>I Google about it and try about... 50 different "solutions"
>Change system date to 7+ days to the past and trigger a false Update lookout, restart... nothing
>Triggered Update lookouts twice to make the sure the phone "knows" I searched for it 10 days ago and today... nothing
>I Literally write the steps down and start superpermutating that **** for around two hours... nothing
>Some other random non-Samsung, non-my-phone-specific "solutions"... nothing
>I come across adb (never used it before, never had to)
>It claimed I could do the OEM Unlock from Windows cmd
>I download adb 15 seconds installer, adb and fastboot drivers (both), I already had Samsung specific USB drivers, everything I need
>open CMD and do adb devices
>see my device there, nice
>adb reboot bootloader
>it boots there, n i c e
>fastboot devices
>... nothing
>fastboot device, maybe it was without the s
>stuck in waiting for device
>close everything, start again
>this time I do directly fastboot OEM unlock
>waiting for device
here I'll explain what I saw in Device Manager in all my adb odyssey:
Drivers are recognized in its normal state (that is, phone connected, no dev ****, just using it) with its full name (Samsung J5 Prime bla bla bla). Besides that I have some Samsung USB Drivers showing as modems? idk why. Once I change my phone state (let's say, I do adb reboot bootloader) drivers completely dissapear. Not even showing as *Unrecognized !*, no "Android Device 1.0". It's not there at all. Only thing I see is is the usb modems? drivers.
And yes, I used every USB Port I have, the only thing it changes is a #n besides the modem drivers.
I did read you have to install drivers twice? Once in each state? I did so and nothing.
I did "Added Legacy Hardware", where I saw different ones: ADB Interface, Samsung ADB Interface, Bootloader Interface, etc. Added every single one of them, updated them (I even got the Google USB thing, it did nothing) Sometimes it would bring some error (Can't do that right now or something like that), sometimes "It's already the best we have", but still not regognizing it in cmd fastboot devices.
I also superpermutated every step I could, even doing things completely illogical. I didn't care, I stayed awake until 9AM doing it... and nothing
I did noticed, at around 5am, half asleep, that my "bootloader" window (in my phone) was... not... really... a bootloader? whenever I would adb reboot bootloader it would get me to the same Download Mode I would get by pressing V- + Power + Home. I dismissed it, not only it was really late, It could have just been a normal misunderstanding... you know, language barriers and such (I'm not english native, so I'm constantly reading things in practically two languages, maybe *Bootloader* and the *DW Mode* where actually the same and people are arbitrarily obtuse, I thought) but it still bothers me nonetheless.
I also tried, since, you know, all I want is a custom ROM, to play with Recovery Mode adb sideload? But I would always get some error 21 and other I didn't really catch.
That's my problem(s). I don't really know what to do, and I don't want to wait seven days (or more, because I read some people waiting for weeks) to have the actual OEM Unlock option in my Dev Options.
Can I get a hand with this? Is my bootloader even active? Can I even do OEM unlock in my current state? did I miss a driver, among the 100+ I downloaded even from dubious webs? Never worked with phones before so I'm practically new on this, last time I touched android I did perfectly flash TWRP through Odin and did everything from there.
please
pretty please
Click to expand...
Click to collapse
Too much long bro
Let me know if you untick the autorestart at odin when you wanna install twrp
Or seen:just enable OEM and usbdebug at dev option
Make sure that download right and latests version of twrp for your phone(so important)
And install that via odin and untick the autoreboot at odin( bc if you don't that android will uninstall it)
When you see the done message on odin unplug your phone and turn it off and after that try to go recovery mode by V+home and power
Hope that works
amirizad_7436 said:
Too much long bro
Let me know if you untick the autorestart at odin when you wanna install twrp
Or seen:just enable OEM and usbdebug at dev option
Make sure that download right and latests version of twrp for your phone(so important)
And install that via odin and untick the autoreboot at odin( bc if you don't that android will uninstall it)
When you see the done message on odin unplug your phone and turn it off and after that try to go recovery mode by V+home and power
Hope that works
Click to expand...
Click to collapse
I made it long so I don't have to reply a hundred times to things I already did.
Yes, I did untick autorestart. No, I can't enable OEM Unlock (that's the problem I'm having), and usbdebug es required to use adb, so yes, I do have that enabled.
Can't do Odin, it always fails.
Nezvanova said:
I made it long so I don't have to reply a hundred times to things I already did.
Yes, I did untick autorestart. No, I can't enable OEM Unlock (that's the problem I'm having), and usbdebug es required to use adb, so yes, I do have that enabled.
Can't do Odin, it always fails.
Click to expand...
Click to collapse
Well
Try to reset factory and use you phone for a week or a month!i don't know any way
If you find one i would be happy to know
I have exactly same problem!
Hello! Maybe its too long ago but did you manage to solve it??
same problem U9 no OEM unlock option :/
Can anyone with this device provide the exact steps to unlock the bootloader. I have tried the many ways offered via google search and none seem to work. I have USB debugging and OEM unlock allowed in the device settings. I can boot into the bootloader via keys and using ADB. I've tried various key combos to get to the page (supposedly available) that allows one to switch the bootloader from locked to unlocked - no luck.
All help appreciated.
Do you mean that the command fastboot oem unlock doesn't work?
Note that: Unlocking bootloader wipes all device's data!
XDHx86 said:
Do you mean that the command fastboot oem unlock doesn't work?
Note that: Unlocking bootloader wipes all device's data!
Click to expand...
Click to collapse
Thanks for your reply and new suggestion. No that does not work either. I go to bootloader download mode, enter the command "fastboot oem unlock" and get "waiting on device". I am connected to the device as I get a response when queried "adb devices". Any other thoughts/suggestions?
[email protected] said:
Thanks for your reply and new suggestion. No that does not work either. I go to bootloader download mode, enter the command "fastboot oem unlock" and get "waiting on device". I am connected to the device as I get a response when queried "adb devices". Any other thoughts/suggestions?
Click to expand...
Click to collapse
You're supposed to boot the device to fastboot/bootloader by adb reboot bootloader not download mode.
Also to detect the device in fastboot the command is fastboot devices
Please if you're new to this stuff then don't do it. May I ask why you're trying to unlock bootloader?
XDHx86 said:
You're supposed to boot the device to fastboot/bootloader by adb reboot bootloader not download mode.
Also to detect the device in fastboot the command is fastboot devices
Please if you're new to this stuff then don't do it. May I ask why you're trying to unlock bootloader?
Click to expand...
Click to collapse
Again, thanks for your reply. I have previously installed Lineage on a Fire HD8. So not quite a newbie but everyone is new once - right? I am trying to install Lineage on this SM-T290.
The command "fastboot devices" is not returning anything but "adb devices" does which leads me to believe my hardware connections are correct. "adb reboot bootloader" does take me to the bootloader but it indicates download mode.
I suspect I am missing something simple. Your help is appreciated. Thanks
You need to enable OEM unlock and debugging mode first. And make sure the PC is allowed to debug on your phone.
Also if fastboot command doesn't return anything then most likely you need the correct device driver, you can get it from here.
Alternatively you can try this method:
Boot to download mode.
Long press volume up. This will wipe your data and automatically reboot.
After reboot you should have unlocked bootloader and OEM unlock option greyed out in the settings.
Installing custom ROM doesn't make your device better.
XDHx86 said:
You need to enable OEM unlock and debugging mode first. And make sure the PC is allowed to debug on your phone.
Also if fastboot command doesn't return anything then most likely you need the correct device driver, you can get it from here.
Alternatively you can try this method:
Boot to download mode.
Long press volume up. This will wipe your data and automatically reboot.
After reboot you should have unlocked bootloader and OEM unlock option greyed out in the settings.
Installing custom ROM doesn't make your device better.
Click to expand...
Click to collapse
Thanks but still no go.
I have enabled usb debugging and enabled OEM unlock (both done previously)
I have (had) installed latest drivers previously
adb devices returns my unit data
adb reboot bootloader command puts device in "download mode !!"
fastboot devices returns "waiting on device"
fastboot oem unlock also returns "waiting on device"
Attempted your alternative method, no go
I understand custom ROM doesn't make device better. I like the learning challenge. Hope you understand. Appreciate your help thus far and any other ideas you might have.
This is 100% driver issue, I already provided the driver link.
The device driver may be different from internet provided driver through windows device manager. Or the driver installed upon connecting the device.
XDHx86 said:
This is 100% driver issue, I already provided the driver link.
The device driver may be different from internet provided driver through windows device manager. Or the driver installed upon connecting the device.
Click to expand...
Click to collapse
Thanks. I had installed a driver from the link you supplied (there were a few options). I'll try others. I appreciate all your help!
Here's how I did it.
Enable Developer mode, usb debug, OEM unlock (you've already done those, by the sound of things).
Power the tablet OFF.
Have your USB cable plugged into the computer but NOT the tablet.
Hold the volume up AND volume down keys simultaneously, then connect the USB cable.
The tablet will vibrate and show a blue-green screen, with Warning at the top and a white triangle with an exclamation mark at the bottom. (This is different from download mode.)
From here, long-press volume up to go into device unlock mode. Follow the instructions.
Heeni said:
Here's how I did it.
Enable Developer mode, usb debug, OEM unlock (you've already done those, by the sound of things).
Power the tablet OFF.
Have your USB cable plugged into the computer but NOT the tablet.
Hold the volume up AND volume down keys simultaneously, then connect the USB cable.
The tablet will vibrate and show a blue-green screen, with Warning at the top and a white triangle with an exclamation mark at the bottom. (This is different from download mode.)
From here, long-press volume up to go into device unlock mode. Follow the instructions.
Click to expand...
Click to collapse
Thanks again but no luck. Let's start with some basics:
My device is a Galaxy Tab A SM-T290 8.0 2019 one UA core version 2.1
Android 10
When I, with power off, press both UP & DOWN volume keys simultaneously, wait a few seconds, insert the USB cable (already in computer), I get a vibration but then a circle with a lightning bolt that shows the battery charge status. The screen does not go blue-green and there is no warning.
I have tried releasing the buttons after the vibration and after I see the battery power circle. No change.
I continue to appreciate your help but feel I am missing something simple or my device is not same as yours.
Let me know if you have given up!
[email protected] said:
Thanks again but no luck. Let's start with some basics:
My device is a Galaxy Tab A SM-T290 8.0 2019 one UA core version 2.1
Android 10
When I, with power off, press both UP & DOWN volume keys simultaneously, wait a few seconds, insert the USB cable (already in computer), I get a vibration but then a circle with a lightning bolt that shows the battery charge status. The screen does not go blue-green and there is no warning.
I have tried releasing the buttons after the vibration and after I see the battery power circle. No change.
I continue to appreciate your help but feel I am missing something simple or my device is not same as yours.
Let me know if you have given up!
Click to expand...
Click to collapse
I see that your tablet has One UA core.
That may make a difference. I can't remember now where I saw it (somewhere on these forums), but I recall seeing that One UI Core is more locked down than the "ordinary" One UI version. Incidentally, I get the same response as you if I plug the tablet into a charger (not computer) while pressing both volume keys.
I'll mention at this point that I'm on the point of going back to stock and relocking the bootloader, because I've not been able to have a custom ROM or recovery and a screenlock (PIN, password, or pattern) at the same time, and no one seems to know any workaround for this. I'm starting to wonder if my tablet is somehow odd.
It's a nice piece of hardware, but a right pain to do any mods to, and Samsung's extra security "features" can cause problems.
Heeni said:
I see that your tablet has One UA core.
That may make a difference. I can't remember now where I saw it (somewhere on these forums), but I recall seeing that One UI Core is more locked down than the "ordinary" One UI version. Incidentally, I get the same response as you if I plug the tablet into a charger (not computer) while pressing both volume keys.
I'll mention at this point that I'm on the point of going back to stock and relocking the bootloader, because I've not been able to have a custom ROM or recovery and a screenlock (PIN, password, or pattern) at the same time, and no one seems to know any workaround for this. I'm starting to wonder if my tablet is somehow odd.
It's a nice piece of hardware, but a right pain to do any mods to, and Samsung's extra security "features" can cause problems.
Click to expand...
Click to collapse
Hey! Once again want to thank you for hangin' in with me on this. So, it seems we have slightly different machines. I purchased mine at COSTCO. They offer a lot of good stuff at low prices. I've noticed, however, they tweak their offerings a little bit so they can honestly say "you can't get this somewhere else." Perhaps the difference in our machines explains that.
I definitely had my unit plugged into the USB port on my computer, not a power supply.
My only purpose in attempting this was the satisfaction of doing it and having two tablets with different operating systems.
Thanks again for your help. All the best!
Here's the reference to One UI Core that I was thinking of: https://forum.xda-developers.com/t/root-for-sm-t290-tab-a-8-0-2019.3965624/post-84355183
I'm not based in North America, and the local market isn't big enough to have retailer-specific variants (or, at least, I've never heard of any), so I probably have a standard item. But from what I've read, specially locked-down items are reasonably common in the US. Which doesn't make it any less frustrating.
Heeni said:
Here's the reference to One UI Core that I was thinking of: https://forum.xda-developers.com/t/root-for-sm-t290-tab-a-8-0-2019.3965624/post-84355183
I'm not based in North America, and the local market isn't big enough to have retailer-specific variants (or, at least, I've never heard of any), so I probably have a standard item. But from what I've read, specially locked-down items are reasonably common in the US. Which doesn't make it any less frustrating.
Click to expand...
Click to collapse
I read the post and tried the extra step of holding the up volume key when the power screen came on. It also didn't work. Unless something new shows up, my quest to unlock this bootlocker is over. I'll find some other technical challenge to chase.
I had the thought of contacting Samsung to see if they would tell me how to do this. My unit is well out of warranty so why should they care? Likely they wouldn't tell me anything but .....
I'm on Denver CO. Where are you? In my work and fun travels I've had the opportunity to visit many parts of the world. Perhaps I've been to your country?
Again thanks for all your help. I could not have gotten as far as I did without it.
I'm in Auckland, New Zealand. It's a good place to live but not if you want cheap tech. Freight costs tend to be high.
Heeni said:
I'm in Auckland, New Zealand. It's a good place to live but not if you want cheap tech. Freight costs tend to be high.
Click to expand...
Click to collapse
Never been to New Zealand. On the bucket list as it seems a beautiful place to live. Been to your close neighbor Austrailia a number of times. Want to go there again to snorkel on the barrier reef. All the best!
[email protected] said:
I read the post and tried the extra step of holding the up volume key when the power screen came on. It also didn't work. Unless something new shows up, my quest to unlock this bootlocker is over. I'll find some other technical challenge to chase.
I had the thought of contacting Samsung to see if they would tell me how to do this. My unit is well out of warranty so why should they care? Likely they wouldn't tell me anything but .....
I'm on Denver CO. Where are you? In my work and fun travels I've had the opportunity to visit many parts of the world. Perhaps I've been to your country?
Again thanks for all your help. I could not have gotten as far as I did without it.
Click to expand...
Click to collapse
Try method below. It worked for me.
Root for SM-T290 (tab a 8.0 2019)
Hi guys, I just bought an SM-T290 for my wife and I was unable to find any info here about rooting it. As most Tab-A tablets "are here", can I use a guide (and twrp) for an older tablet for this newer model?
forum.xda-developers.com
bignikescar said:
Try method below. It worked for me.
Root for SM-T290 (tab a 8.0 2019)
Hi guys, I just bought an SM-T290 for my wife and I was unable to find any info here about rooting it. As most Tab-A tablets "are here", can I use a guide (and twrp) for an older tablet for this newer model?
forum.xda-developers.com
Click to expand...
Click to collapse
Holding vol up and down, with the tablet off, and plugging in the USB from PC to tablet, works. And it makes no difference which end of the cable you plug in last, so long as the buttons are already pressed before both ends are attached.
XDHx86 said:
Do you mean that the command fastboot oem unlock doesn't work?
Note that: Unlocking bootloader wipes all device's data!
Click to expand...
Click to collapse
You do not need a PC to unlock the bootloader. Turn off the device, then you will want to do Volume Up + Volume Down + USB Cable, and then Long Press Volume Up, and then press Volume Up again.
Hi everybody, I'm unable to unlock my samsung M30s even after following various methods properly, I'm able to go upto bootloader, after which I have to long press vol up button to unlock it but nothing happens at this stage, help please, thank you
Did you enable oem unluck under dev options?
treety said:
Did you enable oem unluck under dev options?
Click to expand...
Click to collapse
yes i did, still i get stuck half way thru on odin when i was trying to install twrp
So in your bootloader after pressing up(short click not long), on the upper screen does it say Oem lock = true or false?
If it says oem lock = off it sounds like you have to flash vbmeta in AP so you can flash unofficial binaries. Sorry if I can't follow your problem correctly, just trying to figure out if you just failed at some point or if something really is going wrong... This phone should unlock really easily.
Also may I ask which guide you are following?
Edit: Saw your post on the TWRP thread. So it seems your bootloader is unlocked! As long as you can boot to it you are fine, don't worry!
Get your firmware from frija, https://forum.xda-developers.com/t/tool-frija-samsung-firmware-downloader-checker.3910594/
Make sure you get the right Firmware (Look at your phones box if you still have it, CSC should be at the end of the Model number, also my Box says its a M30FZ even tho it's a M30FN).
After you're back to running firmware and still wanting to install magisk, follow santooshs TWRP thread's install guide.