OEM unlock each time - Samsung Galaxy S9 Questions & Answers

Hi everyone, I rooted my s9 exynos a few weeks ago but wasn't happy with a few things so I just did a clean install of android pie & got it all kind of stock again. I was going to spend a bit more time fiddling & re-rooting, question is, do I need to activate the OEM u nlock again & start a fresh or just install twrp? Reason I'm asking is that in developer options below the OEM unlock switch it states "bootloader already unlocked.
I'd rather know either way before I wipe everything for no good reason, thanks in advance

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Any possibilities to UNLOCK OEM/Bootloader on Android O (Opp3.170518.006)?

Need help here!
Bought an XL via eBay. Found that it's been flashed anyhow. And I can't root/flash ROM or even unlock the bootloader.
Now below is the situation:
1. It's a Verizon, XL, 128GB.
2. It's locked. And OEM unlocking in developer options is GREY.
3. It's stuck in Android O (Opp3.170518.006).
4. dePixel8 doesn't work. Every time I entered the commands "adb shell /data/local/tmp/dePixel8", it ended up with an error.
5. Because of 1., I can't flash TWRP or any bootloader.
I've heard of so-called "FRP Unlock Tool". But it seemed only working on 7.1.2 below and is considered risky for 8.0.
Though 8.0_DP3 is 90% perfect for daily use, I still want to take a chance. But the question is HOW?
doctorm89 said:
Need help here!
Bought an XL via eBay. Found that it's been flashed anyhow. And I can't root/flash ROM or even unlock the bootloader.
Now below is the situation:
1. It's a Verizon, XL, 128GB.
2. It's locked. And OEM unlocking in developer options is GREY.
3. It's stuck in Android O (Opp3.170518.006).
4. dePixel8 doesn't work. Every time I entered the commands "adb shell /data/local/tmp/dePixel8", it ended up with an error.
5. Because of 1., I can't flash TWRP or any bootloader.
I've heard of so-called "FRP Unlock Tool". But it seemed only working on 7.1.2 below and is considered risky for 8.0.
Though 8.0_DP3 is 90% perfect for daily use, I still want to take a chance. But the question is HOW?
Click to expand...
Click to collapse
The only time you could unlock the bootloader on a Verizon Pixel XL was before the operating system updated to Android 7.1.1. Android 7.1.1 was patched so the dePixel8 exploit would no longer work and nobody has found a new way to unlock the bootloader on the Verizon models since then. If you want to downgrade from Android O I think your only option is to deregister your phone from the Android Beta Program. Eventually you will get an OTA that will downgrade your phone back to Nougat but it will also completely wipe your phone including the user data and stored files. You will be starting over from scratch and have to download your user apps again. Unless someone comes up with a new exploit you will not be able to unlock the bootloader or custom flash anything on that phone.
If you wanted to unlock bootloader/flash roms/root etc... you should've come here first to check, then checked with the seller on ebay.
however, your options are:
1) put up with phone in stock (it's really not that bad - which is why development isn't into multiple pages of current roms)
2) sell it and get a google version rather than Verizon

SM-J727U OEM UNLOCK Not Available, Way Forward

Hello members, i have been trying to ask questions relating to some of the new Samsung devices that come without oem unlock options, like the SM-J727U, which has been with me for a couple days now. Just want to know if there can be any way forward.
Can't root device, tried different options, twrp recovery doesn't pass through secure partition. What can be done?

Uninstalling Android R Preview

Hello everyone. I installed the developer preview for Android R and i'm over it. I wanna go back to stock and I tried sideloading the OTA image and I get this message
update package is older than the current build. Downgrade not allowed.
My bootloader is locked so I can't flash the image through fastboot. I need help.
May update released might want to try that one.
hedgehogmd said:
May update released might want to try that one.
Click to expand...
Click to collapse
I tried but it didn't work.
I was on the phone with t-mobile to see if they could unlock my phone but we're having issues with the unlock app.
I miss the days of typing in a code and getting your phone unlocked.
As you have just learned, the developer previews are not the same as beta releases. With the beta releases, you can "quit" the beta program and have the old OS version reinstalled via an OTA update The preview releases have no such OTA reset ability. Therefore, you should not participate in the preview releases unless your phone is unlocked.
If the May release doesn't let you revert back, then I think the only option you will have is to wait until the beta is released. Join the beta and have it installed on your phone and then quit the beat and hope that the OTA update takes you back to stock Android 10. In theory I think it will.
you should use the flashall.bat script if you're installing the factory image. Though this will earase data. Just make sure you have USB debugging on
EDIT: I think you should still be able to unlock your bootloader
EDIT2: After reading a bit more I see that on carrier specific devices, OEM unlocking is greyed out until the phone is sim unlocked. But after you get the app working everything should work fine. Did you use another sim thats not from T Mobile?
RicardoSal24 said:
you should use the flashall.bat script if you're installing the factory image. Though this will earase data. Just make sure you have USB debugging on
EDIT: I think you should still be able to unlock your bootloader
EDIT2: After reading a bit more I see that on carrier specific devices, OEM unlocking is greyed out until the phone is sim unlocked. But after you get the app working everything should work fine. Did you use another sim thats not from T Mobile?
Click to expand...
Click to collapse
I put a different sim on the phone and it worked but it's b/c I did the temporary unlock. After 30 days the phone will be locked again. The phone won't let me unlock the bootloader unless it's a permanent unlock. The problem is I'll have to wait 30 days for the phone to re-lock. I wish t-mobile could just give me a code...
Lucky for me this phone isn't my daily driver but I wanted to revert to stock android b/c I got an invite to test out the Ratio launcher by Blloc. It's incompatible with Android R.
chivamex10 said:
I put a different sim on the phone and it worked but it's b/c I did the temporary unlock. After 30 days the phone will be locked again. The phone won't let me unlock the bootloader unless it's a permanent unlock. The problem is I'll have to wait 30 days for the phone to re-lock. I wish t-mobile could just give me a code...
Lucky for me this phone isn't my daily driver but I wanted to revert to stock android b/c I got an invite to test out the Ratio launcher by Blloc. It's incompatible with Android R.
Click to expand...
Click to collapse
Your best bet would be to just wait until you can permanently unlock it. I got mine from best buy and only recently did I bother with flashing roms on it.
I have a TMO device and had a temp unlock, and obviously it doesn't allow oem unlocking to be enabled. I DM'd TMOhelp on twitter and was able to get a permanent unlock there. They told me that I'd have to wait for my temp unlock to expire before I could perm unlock, but I didn't. If you have trouble with the app, just clear the storage and cache data for it. Once it is actually perm unlocked you'll immediately get a notification and be prompted to restart the phone. After that you should see oem unlocking enabled in dev options and be able to hit bootloader and unlock it.

Root SM-G960W android 10 possible ?

Hello everyone thank you for your time it's been a couple days i'm doing reasearch on how to root my galaxy S9 (canadian) and i'm hitting a wall everytime and some post a far too old to be considered.
So my question is without the OEM unlock option in developper options am i doomed to not being able to root my phone ?
And yes i tried the trick with setting the date manually one month earlier but anyway my phone is more than 1 year old so i'm way past the 7 days delay.
Isn't there a way to unlock it with a computer via USB debugging mode ? ( juste an idea like that i know pretty much nothing)
Any clear answer would be greatly appreciated.
Thank you for your time
OEM Unlock option is pretty much like the gate to unlock your boot loader
if your phone doesn't have the option then that could be cause by some factors like,
- either you can't unlock (I believe there are few versions that factory lock which mean cant be unlocked)
- or you have faied to modify your phone, which you have to wait like 7 days to be able to modify again
That all I know, maybe anyone can correct me if I'm wrong
B1nz said:
OEM Unlock option is pretty much like the gate to unlock your boot loader
if your phone doesn't have the option then that could be cause by some factors like,
- either you can't unlock (I believe there are few versions that factory lock which mean cant be unlocked)
- or you have faied to modify your phone, which you have to wait like 7 days to be able to modify again
That all I know, maybe anyone can correct me if I'm wrong
Click to expand...
Click to collapse
okay i understand more what OEM does thank so as long as i can't unlock it from the inside no modification can come from the outside
You should read through this thread. It has some options that may interest you. The Canadian SM-G960W S9 is definitely boot loader locked that makes it "normally" not able too install any custom ROMs or boot loaders. The good thing with it is that it doesn't trip KNOX!
https://forum.xda-developers.com/ga...s-recoveries--other-development/root-t4043707

Bootloader Unlock SM-G960U

I'm going to keep this short and sweet. I have a Sprint S9 SM-G960U and its activation locked and been factory reset. My friend gave me his old phone after he upgraded because he forgot the lock code and does not remember what google account was used to unlock the device after it was reset from the factory reset boot menu.
Is it possible to unlock the bootloader...if thats even needed, root the device, and flash a custom rom to get around this?
xVoidx said:
I'm going to keep this short and sweet. I have a Sprint S9 SM-G960U and its activation locked and been factory reset. My friend gave me his old phone after he upgraded because he forgot the lock code and does not remember what google account was used to unlock the device after it was reset from the factory reset boot menu.
Is it possible to unlock the bootloader...if thats even needed, root the device, and flash a custom rom to get around this?
Click to expand...
Click to collapse
AFAIK there is no reliable rooting / bootloader unlocking method available
Same question for a european SM-G960U (Snapdragon), where no "OEM unlock" option is available in Developers options.
I've just factory reset it, and am currently waiting for the tedious 7-day uptime period to pass, but am I keeping my hopes too up ??
Please share your results and whether or not it was successful. Thanks!
Well, no luck : no unlock option appeared, and the owner decided to get their device back, so I sadly don't have any result to contribue.
breversa said:
Well, no luck : no unlock option appeared, and the owner decided to get their device back, so I sadly don't have any result to contribue.
Click to expand...
Click to collapse
Bummer!!!

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