Modem needs to be downgraded for ZX3 unlock box to unlock s7 phones or 6.1 OS - Samsung Galaxy S7 Questions and Answers

Modem needs to be downgraded for ZX3 unlock box to unlock s7 phones or 6.1 OS
Hello I was just wondering when i go to unlock a new security Samsung running 6.01 or higher
I always encounter error saying try to downgrade modem if possible
I know how to flash phone to downgrade OS to 5.1
But problem is most of these flash files for newer phones do not have flash files for downgrading to 5.1
My question is i read somewhere you can just temporarily downgrade your modem only
Where can i get these downgraded modem files and are they different then full flash 5.1
I am also not sure which option to choose when I open Odin TO DO MODEM ONLY BL AP CP oR csc
Thank you in advance

Related

Odin flash failed, device 3, binary 2. Help needed!

Hi,
I have a G920F, I was rooted and want to go to stock again. I have restored the device with Smart Switch, but now I am unable to flash any other rom. I have downloaded 3 different roms from Sammobile and get sw. check failed device 3 binary 2 at everyone. The current rom is form Italy Wind the latest OI9. Any suggestions?
Thanks in advance.
Hi, probably you trying to install oldest firmware 5.0.1, download the latest firmware and try again. You are with 5.1, right? This error on odin happens, because you cannot downgrade the firmware. Hope this helps.
I think you can not downgrade even if it is the same Android version.
If it detects you are on a newer bootloader it will give you that error.
What I belive you can do is to extract the bootloader (sboot) and modem from the .tar file and flash ONLY the system through Odin.
Don't know exactly how to do that because I haven't done it but I think that would do; you will have to search and read my friend.
You will have the stock firmware but with latest bootloader and modem.
Hope this helps.
Note: As far as I know this will work if its the same Andorid version; you can not have Android 5.0.2 with 5.1.1 bootloader.
jpdediego said:
I think you can not downgrade even if it is the same Android version.
If it detects you are on a newer bootloader it will give you that error.
What I belive you can do is to extract the bootloader (sboot) and modem from the .tar file and flash ONLY the system through Odin.
Don't know exactly how to do that because I haven't done it but I think that would do; you will have to search and read my friend.
You will have the stock firmware but with latest bootloader and modem.
Hope this helps.
Note: As far as I know this will work if its the same Andorid version; you can not have Android 5.0.2 with 5.1.1 bootloader.
Click to expand...
Click to collapse
Hi,
I have tried what you said, but no succes. The firmware was already recovered with smart switch so the bootloader is the latest.
raj_p said:
Hi,
I have tried what you said, but no succes. The firmware was already recovered with smart switch so the bootloader is the latest.
Click to expand...
Click to collapse
But did you try to flash without the bootloader and modem?

[Completed] Need files to downgrade modem to be able to unlock new security phones

Hello I was just wondering when i go to unlock a new security Samsung running 6.01 or higher
I always encounter error saying try to downgrade modem if possible
I know how to flash phone to downgrade OS to 5.1
But problem is most of these flash files for newer phones do not have flash files for downgrading to 5.1
My question is i read somewhere you can just temporarily downgrade your modem only
Where can i get these downgraded modem files and are they different then full flash 5.1
I am also not sure which option to choose when I open Odin TO DO MODEM ONLY BL AP CP oR csc
Thank you in advance
XDA Visitor said:
Hello I was just wondering when i go to unlock a new security Samsung running 6.01 or higher
I always encounter error saying try to downgrade modem if possible
I know how to flash phone to downgrade OS to 5.1
But problem is most of these flash files for newer phones do not have flash files for downgrading to 5.1
My question is i read somewhere you can just temporarily downgrade your modem only
Where can i get these downgraded modem files and are they different then full flash 5.1
I am also not sure which option to choose when I open Odin TO DO MODEM ONLY BL AP CP oR csc
Thank you in advance
Click to expand...
Click to collapse
Hello,
Please register for XDA account to post as well as reply in the forum.
Please tell us the make and model of your device.
Regards
Vatsal,
Forum Moderator.

[Q] How to downgrade J700F to 5.1.1 after november update(MM)

Hey guys since I upgraded my J700F to the latest version with october security patch
I dont seem to be able ti downgrade my phone to 5.1.1
I tried some ways including deleting 2 files from 5.1.1 rom and fkash but no luck
Everytime i get this error in downloading mode:
sw rev check fail device 1 binary 0
Please someone give me a step by step guide to downgrade to 5.1.1
Thanks
Flash using odin
I guess you will have to do it using odin. Search these forums for the guide. I saw it around here. Use search man. Thanks.
Download the firmware of 5.1.1 of j700f from sam mobiles website and flash it with odin
please i need some help too can't downgrade it from mm to lp.. i read on some tread that the new mm bootloader did that
When boost mobile and sprint and virgin mobile updated their j7s from f3 to ph4 they did the samething but on 6.0.1. What they did was stop the flashing of the older rom which did not have the Asks software security. When you flash a older android version such as 5.0 over a new android version such as 6.0 the flash is declined. You cant downgrade cause the bootloader prevents it thats why theres a error message in odin.. not really sure why youd want 5.0 over 6.0.

Downgrade Modem

I'm on the latest Nougat modem for S6 G920t, G920TUVS6FRA3, and I want to downgrade that modem (causing compatibility issues with Oreo AOSP roms I believe) but every time I do try to downgrade in Odin with CP, I'll boot back in and Baseband will be Unknown and I'll have an Unknown IMEI and no data
Is downgrading not possible or will I have to Downgrade something else as well? Like the bootloader?
I also need to know this. Anyone please help.

Downgrading U5 to U2 or U1 on G930F

I have a galaxy s7 SM-G930F which is currently on U5 Oreo Firmware, i wanted to downgrade it to Nougat U2, tried flashing it with Odin 3.13.1 , the flash failed and i ran into an SW REV error (Device:5, Binary:2), tried several fixed but no solution .
i have 3 questions:
1. is it even possible to downgrade from U5 to U2 (i assume the answer is no but i need confirmation)
2. is it possible to install a custom rom with TWRP that is based on U2 (if yes - how, if not - why)
3.when flashing stock firmware i read that the bootloader version of the firmware must match the current bootloader version, how do i check my current bootloader version and the downloaded firmware bootloader version?
LSGio said:
I have a galaxy s7 SM-G930F which is currently on U5 Oreo Firmware, i wanted to downgrade it to Nougat U2, tried flashing it with Odin 3.13.1 , the flash failed and i ran into an SW REV error (Device:5, Binary:2), tried several fixed but no solution .
i have 3 questions:
1. is it even possible to downgrade from U5 to U2 (i assume the answer is no but i need confirmation)
2. is it possible to install a custom rom with TWRP that is based on U2 (if yes - how, if not - why)
3.when flashing stock firmware i read that the bootloader version of the firmware must match the current bootloader version, how do i check my current bootloader version and the downloaded firmware bootloader version?
Click to expand...
Click to collapse
1. No it is not, once a bootloader is updated it cannot be downgraded
2. No not anymore since S6 because boot files reside on the EFS partition which is not altered when new firmware is flashed. The boot program is written to only allow upgrades to it, never downgrades (thats the easiest way to explain it.) The primary reason for firmware and thus bootloader upgrades is due to security vulnerabilities.
3. It only has to match or be higher. Within the firmware itself the bootloader version is represented by either the letter U or S, for example G930FXXU5ESD2. = U5, firmware is on bootloader version 5. It could have read S5, it would mean the same thing.
In the settings of your phone, tap >about phone>software infomation>baseband version G930FXX......
u6 bootable factory binary for g930f
Hello my wiz kids friends does any 1 have the u6 bootable combination firmware to share please

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