[Tutorial] Root after November security update (A5 2017).

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thangluong

Member
Aug 30, 2015
7
4
Ho Chi Minh
Edit: You can follow the solution of @ashyx through the following link to fix the problem can not flash twrp or boot via Odin. I think it will work ;)
Link: https://forum.xda-developers.com/sa...g-sm-a520f-2017-kernel-source-t3557622/page31






Hello everyone,
After I updated the latest firmware, I was unable to flash BOOT or TWRP via Odin. It just returned the result that ONLY OFFICIAL BINARIES ARE ALLOWED TO BE FLASHED (RECOVERY / BOOT). I think samsung locked the bootloader. Today, I have found a way to fix this problem because knox 0x1 but can not root is not pleasant at all!
I only tested on my A520F, not tested on any other device. I am not responsible for any errors on your device.
1. Go to http://updato.com and download 2 firmware updates with your CSC.
+ Latest firmware 7.0 (November security).
+ Latest firmware 6.0 (MM).
2. Backup your important data :)
3. Reboot to download mode.
4. Add AP, CP, CSC of firmware 7.0 (November security) to the corresponding slot in Odin.
5. Add BL file of lastest firmware 6.0 (MM) to BL slot in Odin.
6. Start and wait a moment.
7. Setup and after that, you can flash TWRP or BOOT via Odin without bootloader errors.
Enjoy!
Sorry for my english...
 

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Last edited:

thangluong

Member
Aug 30, 2015
7
4
Ho Chi Minh
Hi ahyx, i searched google about not being able to flash twrp or boot after security update in November and know the information is that maybe samsung has locked the bootloader. So, I just tried replacing the BL file of the old firmware that I saved on my laptop and it worked. I do not notice that you have found the solution first. Sorry for it as an act of plagiarism. I will link to your topic as a good faith ;) (sorry for my english)
 
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caiquess95

Senior Member
Dec 30, 2016
103
17
Salvador
Oh man, thank you very much !! helped me here too! I had my a5 17 with this 'softbrick' but thank God I was able to install twrp, and so doing root haha I just can not downgrade to the MM.
 

kobejor

Senior Member
Dec 8, 2017
127
11
this one are 100% work?

i need to download lates MM version and lates Nougat version? then i flash only BL of MM and CP,CSC and AP of nougat version? tia
 

caiquess95

Senior Member
Dec 30, 2016
103
17
Salvador
i need to download lates MM version and lates Nougat version? then i flash only BL of MM and CP,CSC and AP of nougat version? tia

Vou need to download the latest Nougat 7.0 firmware (A520FXXU2BQK4) and fw plus MarshMallow 6.0.1 (A520FXXU2AQG4).

I, as a Brazilian, downloaded the fw of Brazil.

And then in AP, CP and CSC you put the respective AP, CP and CSC files of the Nougat rom
and in BL the Marshmallow rom file.

It works, man!

At first I had some problems, the smart was out of system because before finishing the process I got some errors (old usb port, bad contact, etc.). Try to keep all the smart USB drivers on your PC, turn on the debug and also the OEM mode and restore your a5. Today I have been able to downgrade and I am using the stock rom 6.0.1
 

GenisonPedro

Senior Member
Jun 16, 2012
113
185
Vitória da Conquista
Vou need to download the latest Nougat 7.0 firmware (A520FXXU2BQK4) and fw plus MarshMallow 6.0.1 (A520FXXU2AQG4).

I, as a Brazilian, downloaded the fw of Brazil.

And then in AP, CP and CSC you put the respective AP, CP and CSC files of the Nougat rom
and in BL the Marshmallow rom file.

It works, man!

At first I had some problems, the smart was out of system because before finishing the process I got some errors (old usb port, bad contact, etc.). Try to keep all the smart USB drivers on your PC, turn on the debug and also the OEM mode and restore your a5. Today I have been able to downgrade and I am using the stock rom 6.0.1

I'm also Brazilian, and it worked for me! Thank you!
 
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jackjt3

Senior Member
Apr 8, 2012
222
269
It turned out people were stuck with my A7 2017 using the rom of India nougat, I could not install nor the recovery much less to do the root, with your help here I got I'm from Brazil, I just installed via odin the file BL zto android 6, I entered the download mode and installed recovery and did the root, now only joy.
 

RubenDGuerreroG

New member
Jan 5, 2018
1
0
Edit: You can follow the solution of @ashyx through the following link to fix the problem can not flash twrp or boot via Odin. I think it will work ;)
Link: https://forum.xda-developers.com/sa...g-sm-a520f-2017-kernel-source-t3557622/page31






Hello everyone,
After I updated the latest firmware, I was unable to flash BOOT or TWRP via Odin. It just returned the result that ONLY OFFICIAL BINARIES ARE ALLOWED TO BE FLASHED (RECOVERY / BOOT). I think samsung locked the bootloader. Today, I have found a way to fix this problem because knox 0x1 but can not root is not pleasant at all!
I only tested on my A520F, not tested on any other device. I am not responsible for any errors on your device.
1. Go to http://updato.com and download 2 firmware updates with your CSC.
+ Latest firmware 7.0 (November security).
+ Latest firmware 6.0 (MM).
2. Backup your important data :)
3. Reboot to download mode.
4. Add AP, CP, CSC of firmware 7.0 (November security) to the corresponding slot in Odin.
5. Add BL file of lastest firmware 6.0 (MM) to BL slot in Odin.
6. Start and wait a moment.
7. Setup and after that, you can flash TWRP or BOOT via Odin without bootloader errors.
Enjoy!
Sorry for my english...
--------------------------------------------------------------------------------------------------------------------------------------
I try this with the Android 6.0.1 BL but I recived the next error: SV REV. CHECK FAIL. DEVICE: 3. BINARY: 1

please help me.. my Phone is A5 2017 (SM-A520F)
 

ashyx

Inactive Recognized Contributor
Oct 14, 2012
15,087
9,924
--------------------------------------------------------------------------------------------------------------------------------------
I try this with the Android 6.0.1 BL but I recived the next error: SV REV. CHECK FAIL. DEVICE: 3. BINARY: 1

please help me.. my Phone is A5 2017 (SM-A520F)
OK two things.
1. You can't have downloaded the boot image specified as it's a rev. 2 binary not 1.
2. Your device has been updated to rev. 3, so you're probably out of luck for downgrading.
 

lennV

Member
Nov 5, 2014
24
1
OK two things.
1. You can't have downloaded the boot image specified as it's a rev. 2 binary not 1.
2. Your device has been updated to rev. 3, so you're probably out of luck for downgrading.

I just bought the A520F/DS (Malaysia) which still has MM 6.0.1. Can I use the procedure - Flash latest Nougat (Rev. 3 or later) in AP, CP, CSC) leaving BL blank - then do root? (Would I be correct to assume the bootloader will be unaltered, i.e. still be MM 6.0.1?) Thanks.
 

corsicanu

Recognized Developer
Just dropping by to leave some info, I successfully flashed TWRP on my single sim A520F with December bootloader updated to january after porting 7.1.1, and another one, same single sim, with January bootloader. Although, i have a friend with Duos that can't flash anything too since november patch.
So i think this issue is more like a bug, i don't see why samsung would lock only duos devices and not single too. N8 issue is actually the dissappearing oem unlock toggle, csc related. Some countries have it, some countries don't. But in our situation, this is more like a frp lock stuck on, no matter why oem toggle says. I surely hope i am right and future updates will bring duos users the freedom back.
Regards
Screenshot_20180116-144243.jpg

Sent from my SM-A730F using Tapatalk
 
Last edited:
Dec 2, 2016
37
1
Has anyone tried updating to January Security Patch using the same trick? Say, Odin combination of rev 2 BL (from MM) + rev 4 January nougat update (AP+CP+CSC) and had their phones rooted after flashing?

Update: Done using this trick and had my device rooted successfully.
 
Last edited:

Alroid

Senior Member
Sep 23, 2012
248
94
Heaven....
@ashyx
Hi
Is it possible to skip updating bootloader when flashing, to avoid rooting problems?
e.g. Can we update to android O with an unlocked bootloader of Android N or MM?
 

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  • 3
    Edit: You can follow the solution of @ashyx through the following link to fix the problem can not flash twrp or boot via Odin. I think it will work ;)
    Link: https://forum.xda-developers.com/sa...g-sm-a520f-2017-kernel-source-t3557622/page31






    Hello everyone,
    After I updated the latest firmware, I was unable to flash BOOT or TWRP via Odin. It just returned the result that ONLY OFFICIAL BINARIES ARE ALLOWED TO BE FLASHED (RECOVERY / BOOT). I think samsung locked the bootloader. Today, I have found a way to fix this problem because knox 0x1 but can not root is not pleasant at all!
    I only tested on my A520F, not tested on any other device. I am not responsible for any errors on your device.
    1. Go to http://updato.com and download 2 firmware updates with your CSC.
    + Latest firmware 7.0 (November security).
    + Latest firmware 6.0 (MM).
    2. Backup your important data :)
    3. Reboot to download mode.
    4. Add AP, CP, CSC of firmware 7.0 (November security) to the corresponding slot in Odin.
    5. Add BL file of lastest firmware 6.0 (MM) to BL slot in Odin.
    6. Start and wait a moment.
    7. Setup and after that, you can flash TWRP or BOOT via Odin without bootloader errors.
    Enjoy!
    Sorry for my english...
    3
    Just dropping by to leave some info, I successfully flashed TWRP on my single sim A520F with December bootloader updated to january after porting 7.1.1, and another one, same single sim, with January bootloader. Although, i have a friend with Duos that can't flash anything too since november patch.
    So i think this issue is more like a bug, i don't see why samsung would lock only duos devices and not single too. N8 issue is actually the dissappearing oem unlock toggle, csc related. Some countries have it, some countries don't. But in our situation, this is more like a frp lock stuck on, no matter why oem toggle says. I surely hope i am right and future updates will bring duos users the freedom back.
    Regards
    Screenshot_20180116-144243.jpg

    Sent from my SM-A730F using Tapatalk
    2
    i need to download lates MM version and lates Nougat version? then i flash only BL of MM and CP,CSC and AP of nougat version? tia

    Vou need to download the latest Nougat 7.0 firmware (A520FXXU2BQK4) and fw plus MarshMallow 6.0.1 (A520FXXU2AQG4).

    I, as a Brazilian, downloaded the fw of Brazil.

    And then in AP, CP and CSC you put the respective AP, CP and CSC files of the Nougat rom
    and in BL the Marshmallow rom file.

    It works, man!

    At first I had some problems, the smart was out of system because before finishing the process I got some errors (old usb port, bad contact, etc.). Try to keep all the smart USB drivers on your PC, turn on the debug and also the OEM mode and restore your a5. Today I have been able to downgrade and I am using the stock rom 6.0.1
    1
    Hi ahyx, i searched google about not being able to flash twrp or boot after security update in November and know the information is that maybe samsung has locked the bootloader. So, I just tried replacing the BL file of the old firmware that I saved on my laptop and it worked. I do not notice that you have found the solution first. Sorry for it as an act of plagiarism. I will link to your topic as a good faith ;) (sorry for my english)
    1
    Ok so i need to flash my phone with the stock rom again and then wait for the 7 days?
    It depends if you are already RMM STATE :prenormal?