Big problem with the FRP Google lock - Xperia Z4 Tablet Q&A, Help & Troubleshooting

Hello,
i am Stanley from germany and i wanted to ask you here for help. I bought from a guy his used Xperia Tablet Z4 in white SGP-771 with an cracked display. So i ordererd an new display changed it and wanted to make an factory reset. The problem was, i deleted first his google account in the settings and the next moment the black death screen appeared: protected!
I had then tried to restore the firmware or to flash an older firmware to make an downgrade...everything fails. I contacted the pre owner and told him to delete this device frm his account but the says he cannot remember the password from his old account and also not for the recovery adress. It seems he is an cell phone shop trader so he changes the phones and tablets evertime.
OK guys, what should i do now? I am the rightous new owner of this tablet but cannot use it because of the google frp lock. Acutally i flashed the Android 5.1 but it seems this black pretoect screen is in the bootloader integrated and pops up everytime. Unfortunately the bootloader is not unlocked and the developer settings are not set of course because i resetted the device. Is there any hope to get this baby back with some tools and cool tips from you experienced guys?
It would help me a lot..
thanks in advance

I managed again to get in contact with the seller and achieved an unlock from the tablet. Case can be closed

Related

Not sure how to get around this...

Long time since i've posted here but can't figure out a way around new Android security "feature"...
I gave my GF a Moto G 3rd gen for christmas. She really liked it but didn't complete the initial setup so never linked her gmail to the device.
She had a run in with her ex boyfriend who stole her phone and held it for ransom for a few weeks before giving it back. In that time though he had been using it with his own sim card and had setup his gmail on the device. He is gone from the country now and we know of no way to contact him. He had also put a number lock on the phone.
No problem, I thought, i'll just reset the device. So I did a reset and wiped all info.
Upon startup it says:
"Verifying your account"
"This Device was reset. To continue, sign in with a Google Account that was previously synced on the device"
This is not possible as the only Google account ever on the device was the ex boyfriend's and he's gone.
So I checked online and figured "Okay well I'll just re-flash the ROM"...
So I found the base ROM for the phone in Canada and successfully flash it using ADB fastboot.
Turns out that even with the cache and accounts on the device cleared the restart still has the same request.
So I thought. "Well Maybe I can load a custom ROM"...
So I went to work trying to unlock the bootloader to root the device.
I got the code from Motorola and tried to unlock and got the message: "<bootloader> Check 'Allow OEM Unlock' in Developer Options FAILED
Which I cannot do because I cannot see a way into the device to unlock the dev options now.
Not sure what I can do now. This seems like a remarkably flawed security feature...
Never-mind was able to solve via:

FRP Bypass

Hey guys I recently bought a phone and it turns out to be google account locked. I managed to find a combination file to flash it but it doesn't match the firmware.
The firmware is G965USQU3BRK1, and the carrier is sprint.
The combination file I flashed is COMBINATION_FAC_FA80_G965USQU3ARG2_FACFAC_CL13230190_QB18909595_REV01_user_mid_noship_MULTI_CERT.tar and it resulted in the picture below.
https://imgur.com/a/9NT7lnQ
Any help with bypassing the google account verification would be appreciated, thanks!
Hi this worked for me on the s7 and was advertised as working for the s9 hope it helps I cant post live links so just add www
youtube.com/watch?v=Ffnp1nvF1v8
Sounds like a stolen one? Even if you bypass it original owner might have blocked it on network. So you might not be able to use it.
mematuer said:
Hey guys I recently bought a phone and it turns out to be google account locked. I managed to find a combination file to flash it but it doesn't match the firmware.
The firmware is G965USQU3BRK1, and the carrier is sprint.
The combination file I flashed is COMBINATION_FAC_FA80_G965USQU3ARG2_FACFAC_CL13230190_QB18909595_REV01_user_mid_noship_MULTI_CERT.tar and it resulted in the picture below.
https://imgur.com/a/9NT7lnQ
Any help with bypassing the google account verification would be appreciated, thanks!
Click to expand...
Click to collapse
FRP lock is an anti-theft measure and I doubt discussions circumventing it is allowed here (i.e. if they don't allow discussions of carrier unlocking financed phones, how would FRP bypass of a second hand phone someone bought be allowed?).
Your only real option is getting the person whom has the Google account last used on the phone to sign in with the Google account used on the phone. Then after signing in with the Google account perform a factory data reset of the device. After the factory data reset the FRP lock is deactivated.
Otherwise the other option is to return the phone and get your money back.

Questio regarding Mi Account and unlocking bootloader on 5 plus

Apparently I have bought Redmi 5 plus (MPEG7) which was locked with Mi Account or what. The phone works normally, but I cannot add my Xiaomi Account because it gives me some error I don´t remember now.
Tried to update the firmware manually, didn´t help. So I decided to do factory reset, and then, soon after the set up screen I connecet to wifi, my Xiaomi got locked. It says I need to sign in on account which was previously been there.
The guy who sold me this phone, aware me of this, I should not do factory reset because this will happen, but I thought If there is no Mi Account on this phone I am good to go.
Luckily I found local repair shop who helped me to revive this phone by bypassing Mi Account somehow. I can use it with my Gmail account and I still can´t add my Xiaomi Mi Account.
So here goes my question now, how much I can do about that here. Unlocking bootloader and installing custom recovery would help me here. But the thing is I can´t enter my Mi Account on my phone, so that means no unlocking bootloader for me, at least nothing officially.
So my questions goes. Is there any way to unlock bootloader without having MI Account on the phone?
And before I forgot, if I don´t unlock the bootloader, and the phone stay in the same condition, will my phone lock itself again after I update it to MIUI 11, once when the update is available?
For now it is on the latest MIUI available, 10.2 Stable, OEGMIXM
Thanks in advance
Similar problem
Hello!
I have a problem similar to this. And I've been looking for some answers on that. With the current state of the device, I have how to unlock the bootloader, and then install a custom recovery and rom? So far I have not found any answer that is favorable to me. Other than paying for the service.
spaha-bih said:
Apparently I have bought Redmi 5 plus (MPEG7) which was locked with Mi Account or what. The phone works normally, but I cannot add my Xiaomi Account because it gives me some error I don´t remember now.
Tried to update the firmware manually, didn´t help. So I decided to do factory reset, and then, soon after the set up screen I connecet to wifi, my Xiaomi got locked. It says I need to sign in on account which was previously been there.
The guy who sold me this phone, aware me of this, I should not do factory reset because this will happen, but I thought If there is no Mi Account on this phone I am good to go.
Luckily I found local repair shop who helped me to revive this phone by bypassing Mi Account somehow. I can use it with my Gmail account and I still can´t add my Xiaomi Mi Account.
So here goes my question now, how much I can do about that here. Unlocking bootloader and installing custom recovery would help me here. But the thing is I can´t enter my Mi Account on my phone, so that means no unlocking bootloader for me, at least nothing officially.
So my questions goes. Is there any way to unlock bootloader without having MI Account on the phone?
And before I forgot, if I don´t unlock the bootloader, and the phone stay in the same condition, will my phone lock itself again after I update it to MIUI 11, once when the update is available?
For now it is on the latest MIUI available, 10.2 Stable, OEGMIXM
Thanks in advance
Click to expand...
Click to collapse
As far I have did some further research, unfortunately for us there is no solution to this. Basically the phone is connected with the Mi Cloud servers. As there is no alternative to unlock the bootloader, other than the official way, if in any case we got to sign in our account on the phone, the phone will lock itself eventually.
The only solution is the person who owned the phone have to remove the phone from the Mi Cloud service.
I hope at least we will get MIUI 11 and the update will not lock our device again.
If you want to know more about this, I have created a thread on Mi Community forum, so you can check there, one guy tried to help me about this problem, but no success
spaha-bih said:
As far I have did some further research, unfortunately for us there is no solution to this. Basically the phone is connected with the Mi Cloud servers. As there is no alternative to unlock the bootloader, other than the official way, if in any case we got to sign in our account on the phone, the phone will lock itself eventually.
The only solution is the person who owned the phone have to remove the phone from the Mi Cloud service.
I hope at least we will get MIUI 11 and the update will not lock our device again.
If you want to know more about this, I have created a thread on Mi Community forum, so you can check there, one guy tried to help me about this problem, but no success
Click to expand...
Click to collapse
Hello!
I am also getting help to solve the problem. But, it has been 25 days that after sending some photos of the device screens nothing happened regarding the unlock. That is, it remains blocked. I tried help from S-Unlock but showed no interest in solving the problem. I need to find another company or someone to unlock the device next to the server. Feel free to help me if you want.

doogee pattern lock

Hello there.Here is a weird problem.One of my students brought me his mobile phone (Doogee y7).He said he put the pattern wrongly for some times and now even if we put it right,the phone doesn't recognize it.I suggested factory reset BUT even if we did,when the phone starts again it asks for the pattern.He doesn't remember the email password even if we know the email address.(I ll try again to login to gmail) but until then,is there a way to flash cwm or stock rom again so I can unlock it?I have to say that unfortunately USB debugging is not enabled..any help will be much appreciated even if I don't think he ll have any luck with it.(one of the biggest retail stores in Greece told him that the phone is dead and nothing can be done.)

i need help unlocking my device after it has had mi account lock bypass

hi. a while ago (5 years ago) xiaomi note 5 pro was gifted to me when I was living in volos (Greece), now I live in athens and found my old device which was stored in storage boxes, I charged it and it works! i wanted to install a custom rom on it as I hate miui and when I factory reset my phone it locked up, I worry as I try countless passwords and none work, and the phone number linked to the locked xiaomi account is a very old one which I changed about 3 years ago and don't even remember anymore, after trying to get a receipt from KOTSOVOLOS (tech shop where the phone was bought) they said they couldn't find any receipts for such phone. without it xiaomi wouldn't unlock my phone no matter what. so I took it to a shop to bypass the lock and they did. it now works but they told me to never factory reset it as the lock will come back.
they bypassed the lock by corrupting the lock partition, and disableing 5 services (found out myself after digging into the phone by my computer)
now, I wanted to unlock its bootloader to flash a custom rom. but when I try to add an account (from the mi unlock status section in settings) on the device (with sim) it tells me error 20091, and trying to do it straight from mi flash won't work either, as mi flash detects that the device is still locked up and won't proceed. after calling the repair shop, they told me because of the bypass they couldn't unlock its bootloader.
but I don't want to give up right now.
can anyone please help me? any suggestions appreciated, and I will answer all questions you all might have (if any).
thank you!

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