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So I bought this phone from eBay, like many before it. But this time it came with a twist: when I booted the phone, initial setup ran and all wend fine until I got to the register Google account screen.
There, the phone says: "This phone was reset. To continue, sign in with a Google Account that was previously synced on this device".
No matter what account I use, I always get a Toast message saying "Unable to sign in to device due to a unknown error. Please try another account or try to sign in again after 24 hours.".
I'm guessing this is some kind of theft protection where entering a previously synced account "proves" that you're the legit owner. The authorised service here told me that I need some kind of proof that I'm the legit owner and surely enough the eBay seller has issued no invoice containing the phone's IMEI (or any similar document).
Anyway, here I am with this gorgeous phone on my hands which is little more than a brick due to this.
Is there any way I could get it to work again? Returning it will just generate more costs for me and I'd like to avoid that.
I've seen guides on youtube where they managed to bypass this security measure, but both methods I've seen failed for me. I guess the version running on my phone is just too recent and plugged all the holes.
Do I have any way of downgrading the software at least? Note that this is a fully locked phone and I can't even start TWRP from fastboot.
Anything else?
Edit: Now that I'm re-reading this post, it occurred to me that there's very little chance that this phone wouldn't be a stolen one. Had it not been, the seller would easily issue me an invoice.
Leaving this post only because my searching hasn't turned up anything on XDA. Probably also reporting the guy on eBay.
velis74 said:
So I bought this phone from eBay, like many before it. But this time it came with a twist: when I booted the phone, initial setup ran and all wend fine until I got to the register Google account screen.
There, the phone says: "This phone was reset. To continue, sign in with a Google Account that was previously synced on this device".
No matter what account I use, I always get a Toast message saying "Unable to sign in to device due to a unknown error. Please try another account or try to sign in again after 24 hours.".
I'm guessing this is some kind of theft protection where entering a previously synced account "proves" that you're the legit owner. The authorised service here told me that I need some kind of proof that I'm the legit owner and surely enough the eBay seller has issued no invoice containing the phone's IMEI (or any similar document).
Anyway, here I am with this gorgeous phone on my hands which is little more than a brick due to this.
Is there any way I could get it to work again? Returning it will just generate more costs for me and I'd like to avoid that.
I've seen guides on youtube where they managed to bypass this security measure, but both methods I've seen failed for me. I guess the version running on my phone is just too recent and plugged all the holes.
Do I have any way of downgrading the software at least? Note that this is a fully locked phone and I can't even start TWRP from fastboot.
Anything else?
Edit: Now that I'm re-reading this post, it occurred to me that there's very little chance that this phone wouldn't be a stolen one. Had it not been, the seller would easily issue me an invoice.
Leaving this post only because my searching hasn't turned up anything on XDA. Probably also reporting the guy on eBay.
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Click to collapse
From the Settings / About, what is exact (full) build name/number?
Generally, if you are on Nougat then IMO, rolling back to MM should completely reset your phone.
You cannot flash TWRP without unlocking Bootloader. But that will not help much for resetting Google protection.
Btw, enable Developer's menu, does it allow you to unlock FRP/OEM Unlocking - in that case you will be able to reset all from EMUI recovery.
zgfg said:
From the Settings / About, what is exact (full) build name/number?
Generally, if you are on Nougat then IMO, rolling back to MM should completely reset your phone.
You cannot flash TWRP without unlocking Bootloader. But that will not help much for resetting Google protection.
Btw, enable Developer's menu, does it allow you to unlock FRP/OEM Unlocking - in that case you will be able to reset all from EMUI recovery.
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He can't get passed the setup screen
Twisted Prime said:
He can't get passed the setup screen
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- Boot to Recovery (switch off, press and keep pressing Vol+ and Pow). Does it boot to stock Recovery and does it allow there to Factory reset (it should but if FRP was unlocked)
- Boot to Fastboot (switch off, connect by USB to PC, press Vol- and Pow), do you see Phone (Bootloader) and FRP locked or unlocked?
zgfg said:
- Boot to Recovery (switch off, press and keep pressing Vol+ and Pow). Does it boot to stock Recovery and does it allow there to Factory reset (it should but if FRP was unlocked)
- Boot to Fastboot (switch off, connect by USB to PC, press Vol- and Pow), do you see Phone (Bootloader) and FRP locked or unlocked?
Click to expand...
Click to collapse
It is stock recovery. I don't recall the option for factory reset. In fact there's no options at all, save for reboots.
Fastboot says everything is locked as it should be.
Don't know how to downgrade to MM.
velis74 said:
It is stock recovery. I don't recall the option for factory reset. In fact there's no options at all, save for reboots.
Fastboot says everything is locked as it should be.
Don't know how to downgrade to MM.
Click to expand...
Click to collapse
Rollback instructions are here
https://forum.xda-developers.com/showpost.php?p=72153575&postcount=2
But not sure would it allow you to setup.
That is Factory Reset Protection (FRP/OEM Unlocking) - if it was unlocked you would be allowed to reset from recovery.
You can ask seller - maybe he can login to his Google account and remotely remove Google account from the sold phone.
Or you can try DC Unlocker, not sure would it work
https://www.dc-unlocker.com/DC-Phoenix-flash-repair-tutorial
Well, DC unlocker ultimately worked, but not before buying a wrong package, having to ask tech support, etc, etc. Not to mention the guy really has no patience for people who don't have his level of understanding of the subject. Why does he do it then if he hates the whole thing so much?
velis74 said:
Well, DC unlocker ultimately worked, but not before buying a wrong package, having to ask tech support, etc, etc. Not to mention the guy really has no patience for people who don't have his level of understanding of the subject. Why does he do it then if he hates the whole thing so much?
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Click to collapse
So did you use DC Unlocker to unlock Bootloader or DC Phoenix to reinstall the phone?
zgfg said:
So did you use DC Unlocker to unlock Bootloader or DC Phoenix to reinstall the phone?
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Click to collapse
DC unlocker. I wanted minimal impact on the OS as the phone is for my daughter and she doesn't do custom ROMs et al
velis74 said:
DC unlocker. I wanted minimal impact on the OS as the phone is for my daughter and she doesn't do custom ROMs et al
Click to expand...
Click to collapse
Sorry for bothering but I'm interested now - when Bootloader was unlocked (and FRP too), were you just able to pass setup or you needed to do Factory reset from Recovery or how did you get the stock ROM working for you
Final resolution: the seller sent me an invoice. I guess that means that the phone wasn't stolen after all since they can only expect that this will be entered into Huawei databases.
zgfg said:
Sorry for bothering but I'm interested now - when Bootloader was unlocked (and FRP too), were you just able to pass setup or you needed to do Factory reset from Recovery or how did you get the stock ROM working for you
Click to expand...
Click to collapse
The procedure was thus:
1. unlocker unlocked the FRP
2. phone rebooted into a factory reset (low level) mode - it specifically said "low level"
3. phone booted into normal Android where the FRP protection was no longer active. On screen where it previously demanded a previous Google account it now only demanded A (any) Google account as I'm used to from all the other phones I ever bought.
Sorry old post
Hey guys, i've reseted my xt1802 and now when i try to download or execute Netflix i got the message that my device its uncertified by play protect. Before the reset i could normally open netflix and every other app but now i cant. My bootloader is unlocked but i dont think that is whats causing the problem because before the reset the bootloader was unlocked. I've tried both supports (Netflix and Motorola) but no one got me results (as usual). I have oreo stock in april security patch. Can anyone help me? PS: I'm open to install a new ROM if that is necessary.
Joaoovn said:
Hey guys, i've reseted my xt1802 and now when i try to download or execute Netflix i got the message that my device its uncertified by play protect. Before the reset i could normally open netflix and every other app but now i cant. My bootloader is unlocked but i dont think that is whats causing the problem because before the reset the bootloader was unlocked. I've tried both supports (Netflix and Motorola) but no one got me results (as usual). I have oreo stock in april security patch. Can anyone help me? PS: I'm open to install a new ROM if that is necessary.
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I've fixed this issue. I've installed twrp and rooted with magisk and it work, i don't understand why or how but it work!!!
Hi there guys, is there a option to regain access to my Oneplus 3T without loosing all my Data?
Fingerprint is still saved on the device, Bootloader is unlocked, its rooted and i think not encryptet.
At startup i get the message "Your device has been unlocked and cant be trusted"
It would be great to regain access because i have a lots of personal data and my google authenticator on that phone...
AndroidLost is also installed on the Phone but since android 7 sadly you cant unlock it with an App
Any advice would be great.
DirtyButterBrot said:
Hi there guys, is there a option to regain access to my Oneplus 3T without loosing all my Data?
Fingerprint is still saved on the device, Bootloader is unlocked, its rooted and i think not encryptet.
At startup i get the message "Your device has been unlocked and cant be trusted"
It would be great to regain access because i have a lots of personal data and my google authenticator on that phone...
AndroidLost is also installed on the Phone but since android 7 sadly you cant unlock it with an App
Any advice would be great.
Click to expand...
Click to collapse
The message you're seeing is normal for an unlocked bootloader. It's just a warning, nothing else.
Is that message all you're concerned about? The phone will boot normally if you don't press any keys.
BillGoss said:
The message you're seeing is normal for an unlocked bootloader. It's just a warning, nothing else.
Is that message all you're concerned about? The phone will boot normally if you don't press any keys.
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I forgot the Code and i need my Data back from the device.
i just thought this would open some possibilites to regain access on my phone
DirtyButterBrot said:
I forgot the Code and i need my Data back from the device.
i just thought this would open some possibilites to regain access on my phone
Click to expand...
Click to collapse
If you install TWRP, then you can remove your lock screen password by deleting any gatekeeper.* and locksettings.* files from /data/system using the TWRP file manager.
Hello,
I bought a second-hand pixel 5, after using it for a few days I wanted to reset it and I ran into an mdm lock, is there a solution?
thanks in advance
MDM meaning Mobile Device Manager?
Go to Settings > Security > Device Admin Apps, and disable whatever is in there. If that agent was still present after a factory reset I would highly recommend flashing a factory image with the Android Flash Tool, after you've enabled developer options and USB debugging.
Will try and repport, ty for the reply
Yeah it mean mobile device manager
malikou said:
Will try and repport, ty for the reply
Yeah it mean mobile device manager
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@malikou checking in to see if you had success?
V0latyle said:
@malikou checking in to see if you had success?
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Click to collapse
just back at home, cant flashing a factory image cause of oem unlock is greyed and cant turn it on
Are you able to remove the MDM app?
Unfortunately, the ability to unlock the bootloader is set at ROM build time, so if you got a device that was sold to a particular enterprise, for example, they may have specified that ability to be disabled. That also may mean that the MDM app was baked into system, which means that a factory reset won't remove it.
Still....you can try rebooting to recovery and try to perform a factory reset there, although I suspect as I mentioned the MDM may actually be integral to the firmware.
yeah the app is bakeday firmware as you said, there are a bypass trick for android 11 but yesterday i got the ota and i m stuck on set up screen with a google authentification and no workaround to bypass this cheat
malikou said:
yeah the app is bakeday firmware as you said, there are a bypass trick for android 11 but yesterday i got the ota and i m stuck on set up screen with a google authentification and no workaround to bypass this cheat
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Click to collapse
Sorry to hear that. That's why I'm very cautious about buying secondhand devices.
Hi have similar problem with mdm on pixel 4. Any solution?
Motorih90 said:
Hi have similar problem with mdm on pixel 4. Any solution?
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Click to collapse
Please read this thread. If you buy an enterprise device, it will likely have an MDM app baked into the firmware that you cannot remove without root; unfortunately, root is not possible without unlocking the bootloader, and unlocking the bootloader is not possible if OEM unlocking is not allowed in the ROM.
V0latyle said:
Please read this thread. If you buy an enterprise device, it will likely have an MDM app baked into the firmware that you cannot remove without root; unfortunately, root is not possible without unlocking the bootloader, and unlocking the bootloader is not possible if OEM unlocking is not allowed in the ROM.
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Yes. But, it works for Android 11
My phone was working
Motorih90 said:
Yes. But, it works for Android 11
My phone was working
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Click to collapse
What works? Your question isn't clear.
Again: If you bought an Enterprise device, it is likely that you will NOT be able to remove the MDM app or root the device - regardless of the Android version.
V0latyle said:
What works? Your question isn't clear.
Again: If you bought an Enterprise device, it is likely that you will NOT be able to remove the MDM app or root the device - regardless of the Android version.
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Click to collapse
My phone with mdm was working good with "verizon cell unlock" method (via adb) on Android 11.
For Android 12 that method is not working
I searching for another solution.
Now I removed com.android.vending (play market). Without play market device working well, but...no market.
Motorih90 said:
My phone with mdm was working good with "verizon cell unlock" method (via adb) on Android 11.
For Android 12 that method is not working
I searching for another solution.
Now I removed com.android.vending (play market). Without play market device working well, but...no market.
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Click to collapse
By "unlock" do you mean bootloader unlock, or carrier unlock?
I'm still not quite sure what you are asking.
V0latyle said:
By "unlock" do you mean bootloader unlock, or carrier unlock?
I'm still not quite sure what you are asking.
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MDM lock. Phone has "MobileIron" integration. When i connect to intternet - "Your device controls by admin, all data will be wiped in 2 hrs". Cell also unlocked. Bootloader inactive and locked.
But cell unlock method was working for it (with android 11). For android 12 - not
Motorih90 said:
MDM lock. Phone has "MobileIron" integration. When i connect to intternet - "Your device controls by admin, all data will be wiped in 2 hrs". Cell also unlocked. Bootloader inactive and locked.
But cell unlock method was working for it (with android 11). For android 12 - not
Click to expand...
Click to collapse
It is an enterprise device - meaning, as I've pointed out, that the MDM app is integral with the firmware. This, coupled with the fact you cannot unlock the bootloader, severely limits what you can do with the device.
If you're specifically asking about carrier unlock to use it on a different carrier, that is a different topic that needs it own thread. Please do not hijack threads with off topic comments.
I think you don't understand me correctly... But, ok.
Motorih90 said:
I think you don't understand me correctly... But, ok.
Click to expand...
Click to collapse
Help me understand. What exactly are you trying to accomplish?
I just bought a used Pixel 5 and encountered an MDM lock. Phone was functioning fine on A11 but after upgrading to A12, the following message pops up and won't let me continue using the device:
"Your device controls by admin, all data will be wiped in 2 hours".
Resetting my device doesn't help, the same error comes back during Android setup.
The good news is that after contacting the seller they assured me that they will contact the original enterprise owner and that MDM unlocking can easily be done remotely. Bad news is that I'm assuming even after MDM unlock the bootloader will remain locked since this device obviously didn't come from Google directly. But fingers crossed.
betacrypt said:
I just bought a used Pixel 5 and encountered an MDM lock. Phone was functioning fine on A11 but after upgrading to A12, the following message pops up and won't let me continue using the device:
"Your device controls by admin, all data will be wiped in 2 hours".
Resetting my device doesn't help, the same error comes back during Android setup.
The good news is that after contacting the seller they assured me that they will contact the original enterprise owner and that MDM unlocking can easily be done remotely. Bad news is that I'm assuming even after MDM unlock the bootloader will remain locked since this device obviously didn't come from Google directly. But fingers crossed.
Click to expand...
Click to collapse
Best of luck, this is why I don't ever recommend buying surplus enterprise devices for consumer use
Hello,
First of all I'm new at XDA Forum's, so I'm not sure to be in the right thread, if so, let me know! I'm new too in mobiles stuff, so forgive me if I write something basic or absurd.
I'm trying to unlock the bootloader of a Samsung Galaxy Tab S2 (SM-T813, 2016) Android 7 (Nougat) unsuccessfully.
I've tried number of tuto's (Android & Samsung dedicated) without success: most of them appeal to fastboot command's included in the 'Android SDK Platform Tools' with adb but Samsung devices don't understand the fastboot commands. The recommended process tells to reboot in bootloader mode which actually is the Download mode at Samsung without any possibility to dialogue with the tablet and when i type in the windows command line any fastboot command, it gets stucked waiting for the device to answer. The only sane tuto that i found was on XDA Forum 'https://forum.xda-developers.com/t/...ng-galaxy-tab-s2-stock-to-android-10.4206561/' that describes on this particular device the process to upgrade the firmware from Android 7 to Android 10 i.e. from a device with a stock firmware which is my case, the only thing is that I don't want at the moment to upgrade the firmware but 'only' to unlock the bootloader of this tablet!
Could anyone who experienced this novice issue on this device or Samsung devices help me solve it? Thanks in advance for your answers.
Eric
Hi,
No one to help me in that matter?
How to unlock this Samsung device without using the fastbot commands, which Samsung devices don't understand?
Do you think that the process described in 'https://forum.xda-developers.com/t/...ng-galaxy-tab-s2-stock-to-android-10.4206561/' will also unlock the bootloader?
Rgds
Eric
edevoucoux said:
Hi,
No one to help me in that matter?
How to unlock this Samsung device without using the fastbot commands, which Samsung devices don't understand?
Do you think that the process described in 'https://forum.xda-developers.com/t/...ng-galaxy-tab-s2-stock-to-android-10.4206561/' will also unlock the bootloader?
Rgds
Eric
Click to expand...
Click to collapse
I am trying to root my samsung device too but it has been a headache too. I cannot even unlock bootloader, which is apparently necessary to root my device. I have a samsung s20 fe snapdragon with android 11. Have you found that option in "developers options"? It should be one of the first options.
Hello Space_Bear_77,
Though it is not the same device, I'll try to help you, I mean It's my own device and my own experiment.
Well, I have had a very productive talk on another forum: Phonandroid 'https://www.phonandroid.com/forum/t...sm-t813-gts210vewifi-t813xxs2btj4-xef.213632/' and learned by myself too.
Actually, it is not necessary to go through the phase unlock bootloader on Samsung devices, It is done when you flash a custom recovery, the custom firmware and the rooting App. Have a look at these links: 'https://forum.xda-developers.com/t/...ng-galaxy-tab-s2-stock-to-android-10.4206561/' and 'https://forum.xda-developers.com/t/rom-unofficial-10-lineageos-17-1-t713-t719-t813-t819.4070161/'.
Moreover, as you will see looking at these links, you'll have to take care at 2 characteristics of the custom firmware you'll choose to flash:
Choose a custom firmware that fit with your device. As an example, in my case, It is an SM-T813, gts210vewifi, T813XXS2BSG1, CSC = XEF (French CSC), you'll easily found lists of all CSC on the web and found which are yours related to your country.
I don't know the status of your device: did you already try to flash It or not? Anyway, you can use 'DevCheck' available on the Google Play Store, this App will give you all the characteristics I've listed above on a rooted device or not.
Regarding the 'developers options', again, I don't know Android 11 but on my device, one have just to authorize 'Déboguage USB' and 'Déverrouillage OEM'. Sorry, I'm French and I don't know how It is called in English but I think you'll find It easily.
Hoping that this will help you, don't hesitate to let me know and ask another questions or give me more precisions, I'll try to help.
Rgds
Eric