S20 FE bootloop after security update

[jrdef]

So I never posted here but I usually pass by some topics so sorry for any mistake in creating this discussion. Today I deleted some stuff from my S20 FE and downloaded via OTA the march security update in my device, then I was caught by surprise when saw it restarting more than once, instantly I panicked cause this happened years ago with another cellphone and I was like "oh no, not again". Unfortunatelly I'm a idiot for not backing up most of my files over the last year and now I really want some suggestions of you guys for solving It and possibly without losing any data cause there are so much important things. I saw something about using Odin to unbrick It, but I'm afraid it delete everything. I'm not a newbie, I usually did custom ROM my other phones and stuff and once I managed to recover some stuff using adb pull as far as I remember.

Important information:
- It's the snapdragon variant with 4g and Is running the latest update of Android 13
- Apparently Is soft-brick, the cellphone can go to download mode, but I couldn't make It go into fastboot
- When I manage to do the stuff to go to fastboot, appears the android robot loading something, It goes to 100% and bootloop again
- It is detected by the PC, but It isn't listed as a acessible storage neither It files
- Only way to turn It off Is discharging and with a lot of restarts It's heating a lot


Please, I beg for help! Anything might help!

 

[ze7zez]

For modern Samsung phones, there is only download or recovery mode.
If you're trying to get a fastboot mode that doesn't exist, you're going to hit strange places.

Try a 1-file firmware flash in Odin. Perhaps the data will remain intact.
You absolutely can't use 4-file firmware for flashing, because you will definitely wipe everything from the phone.

 

[mezacorleehone]

there is a way that I have not tried on a semi-breick.

using odin,

BL
PA.
CP.
CSC_HOME.

(MUST BE CSC_HOME NOT THE NORMAL CSC)

So it doesn't format the internal storage. It is as if you updated via ota.

Go into download mode and follow the procedure.

look for the system identical to that of the ota or a version earlier.

 

[mezacorleehone]

I update my cell phone like this, I never get the updates by ota,

so under the most current system, I open odin.

I put everything in its place, the CSC_HOME is the one I use and not the normal CSC.

This makes it only update and does not delete anything, as if it were an ota.

I did it recently from the January to February patch.

 

[jrdef]

For modern Samsung phones, there is only download or recovery mode.
If you're trying to get a fastboot mode that doesn't exist, you're going to hit strange places.

Try a 1-file firmware flash in Odin. Perhaps the data will remain intact.
You absolutely can't use 4-file firmware for flashing, because you will definitely wipe everything from the phone.

excuse me, but what's a 4-file firmware? My principal concern is about the software I''ll flash, cause the one that got me a problem was a security patch of 1gb of content, and when I download the last one in these sites is a 6gb file apparently listed as the same date I got, so I kinda confused If it screws one and for all. Other thing I was thinking about It's if It's possible to use any adb command like adb pull or something, principally cause I'm afraid I couldn't manage to install a 6gb file because the device is short in storage

there is a way that I have not tried on a semi-breick.

using odin,

BL
PA.
CP.
CSC_HOME.

(MUST BE CSC_HOME NOT THE NORMAL CSC)

So it doesn't format the internal storage. It is as if you updated via ota.

Go into download mode and follow the procedure.

look for the system identical to that of the ota or a version earlier.

So I searched for the last one, couldn't find the 1gb security patch cause It's only available a 6gb but with the same date as the one I instaled via OTA. Well, my concern is that I don't have these 6gb available in my device, and I was thinking about the adb pull command, I haven't tried yet adb commands at the moment, but It was the solution I used years ago in a Motorola device and managed so rescue most of my files, do you think It's an option or there Is any other way I could manage to get some available storage to install the firmware via odin or even try to "naturally" unbrick It, cause maybe the problem It's beeing caused by insufficient storage, right? Only thing I know It's I am hella anxious about It

 

[mezacorleehone]

So I searched for the last one, couldn't find the 1gb security patch cause It's only available a 6gb but with the same date as the one I instaled via OTA. Well, my concern is that I don't have these 6gb available in my device, and I was thinking about the adb pull command, I haven't tried yet adb commands at the moment, but It was the solution I used years ago in a Motorola device and managed so rescue most of my files, do you think It's an option or there Is any other way I could manage to get some available storage to install the firmware via odin or even try to "naturally" unbrick It, cause maybe the problem It's beeing caused by insufficient storage, right? Only thing I know It's I am hella anxious about It

hello colleague a way of not losing anything. It's how I describe it to you. download system 6.44 gb android 13. it can be current patch or a previous one. you load the whole system by odin and you must put CSC_HOME not normal CSC.

 

[mezacorleehone]

hello colleague a way of not losing anything. It's how I describe it to you. download system 6.44 gb android 13. it can be current patch or a previous one. you load the whole system by odin and you must put CSC_HOME not normal CSC.

It doesn't matter if you have 1 GB of internal storage.. odin will only update the system. It will not integrate the 6.44 gb of the system .. only what is necessary to update without losing mada

 

[jrdef]

hello colleague a way of not losing anything. It's how I describe it to you. download system 6.44 gb android 13. it can be current patch or a previous one. you load the whole system by odin and you must put CSC_HOME not normal CSC.

Thanks. I'll try it, don't know If I can because of the insufficient storage, but let's see It

It doesn't matter if you have 1 GB of internal storage.. odin will only update the system. It will not integrate the 6.44 gb of the system .. only what is necessary to update without losing mada

Thanks a lot for responding and helping me, at the moment we all get kinda nervous, but I'm positive about It will work out all well. Later I'll post results

For modern Samsung phones, there is only download or recovery mode.
If you're trying to get a fastboot mode that doesn't exist, you're going to hit strange places.

Try a 1-file firmware flash in Odin. Perhaps the data will remain intact.
You absolutely can't use 4-file firmware for flashing, because you will definitely wipe everything from the phone.

So what's a 1-file and 4-file firmware? The one I download does have AP, BL, CP CSC, that would be an 4-file firmware for flashing? I saw this information about https://android.stackexchange.com/q...msung-4-filesrepairing-firmware-and-single-fi

Well, about the 4-file, there is problem of wiping everything even if using CSC_home? Some research and other response told It would not, but what's your opinion about? Btw, I appreciate the effort to help. Thanks.

 

[ze7zez]

Using firmware.zip containing 4 files will clear the partition before flashing.
Therefore, the suggestion to upload only CSC_HOME may not solve the problem described in the OP.
There may be data loss, although this is not certain.
If you find reliable information from some user that the data will not be deleted, then the risk of data loss will be less, but it will be there nonetheless.

Since you don't have the ability to run the phone in download mode to wipe the cache partition, the only sensible choice to revive the phone is to renew the partition with 4-file firmware.

Please treat my post as advice and not as an oracle.
You will have to make the final decision on the course of action yourself.

 

[mezacorleehone]

Using firmware.zip containing 4 files will clear the partition before flashing.
Therefore, the suggestion to upload only CSC_HOME may not solve the problem described in the OP.
There may be data loss, although this is not certain.
If you find reliable information from some user that the data will not be deleted, then the risk of data loss will be less, but it will be there nonetheless.

Since you don't have the ability to run the phone in download mode to wipe the cache partition, the only sensible choice to revive the phone is to renew the partition with 4-file firmware.

Please treat my post as advice and not as an oracle.
You will have to make the final decision on the course of action yourself.

Hello colleague.

Well, for my part I tell you that you comment wrongly.

I update security patches by odin.

It's already 3 times that I update by odin only the patches and it doesn't delete anything at all.

I use the 4 files, have you ever done it or do you just comment it without having done it?

I repeat the procedure

open odin and load the files like this.

BL_G781USQU9HWB2_G781USQU9HWB2_MQB61904472_REV00_user_low_ship_MULTI_CERT.tar.md5

AP_G781USQU9HWB2_G781USQU9HWB2_MQB61904472_REV00_user_low_ship_MULTI_CERT_meta_OS13.tar.md5

CP_G781USQU9HWB2_CP23675490_MQB61904472_REV00_user_low_ship_MULTI_CERT.tar.md5

HOME_CSC_OYN_G781UOYN9HWB2_MQB61904472_REV00_user_low_ship_MULTI_CERT.tar.md5

Until now, when the odin process is finished, my s20 fe turns on and a screen appears

like the one I will upload.

I am giving a possible solution to the problem that he asks for, let's hope it solves his problem.

If the system continues to give problems, it would be to look for another alternative.

 

[mezacorleehone]

I invite you to investigate

what is the use of CSC_HOME

Search on Google:

How to update my samsung without losing information.

you will see the instructions,

I already did it and nothing was deleted (I was afraid because it was the first time I did it, but it was successful)

 

[mezacorleehone]

If you have doubts, you can keep looking.

I only gave my opinion about a procedure that I currently do with my s20 faith.

I have not lost information, good luck colleagues.

 

[mezacorleehone]

Entonces, ¿qué es un firmware de 1 y 4 archivos? El que descargo si tiene AP, BL, CP CSC, ese seria un firmware de 4 archivos para flashear? Vi esta información sobre https://android.stackexchange.com/questions/141460/what-is-the-difference- between-samsung-4-filesrepairing-firmware-and-single-fi

Bueno, sobre el archivo 4, ¿hay un problema de borrar todo incluso si se usa CSC_home? Algunas investigaciones y otras respuestas dijeron que no lo haría, pero ¿cuál es su opinión? Por cierto, agradezco el esfuerzo de ayudar. Gracias.

 

[mezacorleehone]

Update/Flash/Unbrick your device via Odin

Hello everyone! I made a tutorial regarding flashing the latest update when not available in your region: Video tutorial: Steps: 1. Download and extract both Frija and Odin. 2. Launch Frija. 3. Check the "Auto" button. Write your device's...

forum.xda-developers.com

 

[jrdef]

Update/Flash/Unbrick your device via Odin

Hello everyone! I made a tutorial regarding flashing the latest update when not available in your region: Video tutorial: Steps: 1. Download and extract both Frija and Odin. 2. Launch Frija. 3. Check the "Auto" button. Write your device's...

forum.xda-developers.com

Well, I did everything about the home_CSC using the last firmware available but no success, only positive thing that happened Is that now I can access the recovery mode. So I was thinking of trying other firmware that Is available and kinda matches the date that the last update came. If you guys have any more advice I'd appreciate and thanks for the help so far

 

[jrdef]

Using firmware.zip containing 4 files will clear the partition before flashing.
Therefore, the suggestion to upload only CSC_HOME may not solve the problem described in the OP.
There may be data loss, although this is not certain.
If you find reliable information from some user that the data will not be deleted, then the risk of data loss will be less, but it will be there nonetheless.

Since you don't have the ability to run the phone in download mode to wipe the cache partition, the only sensible choice to revive the phone is to renew the partition with 4-file firmware.

Please treat my post as advice and not as an oracle.
You will have to make the final decision on the course of action yourself.

Actually I can now wipe cache partition, but unfortunatelly the bootloop continued after 4 file proccess in Odin. No way I'm really going to lose my files because a security update, I'm really not willing to give up, if you have any advice or suggestion leave it here please

 

[Pupet_Master]

Actually I can now wipe cache partition, but unfortunatelly the bootloop continued after 4 file proccess in Odin. No way I'm really going to lose my files because a security update, I'm really not willing to give up, if you have any advice or suggestion leave it here please

Sound like a system app is frozen. Maybe you could use an ADB command to unfreeze apps

 

[jrdef]

Sound like a system app is frozen. Maybe you could use an ADB command to unfreeze apps

I remember installing wps office app when my device restarted to install the system update, it's my main suspect about what caused the bootloop. Well, I appreciate your sugestion but could you please guide me in this proccess? I'm new to Samsung and the last time I managed to use ADB commands was in Motorola, now in samsung I guess I'm not doing the procedure as I should. I'm really desperate, not only because I need my device for everything but mainly because I really don't want to lose my data

 

[Pupet_Master]

I remember installing wps office app when my device restarted to install the system update, it's my main suspect about what caused the bootloop. Well, I appreciate your sugestion but could you please guide me in this proccess? I'm new to Samsung and the last time I managed to use ADB commands was in Motorola, now in samsung I guess I'm not doing the procedure as I should. I'm really desperate, not only because I need my device for everything but mainly because I really don't want to lose my data

Well it could be the problem. The problem is that with a unlocked phone (via TWRP) we can use ADB commands.
Put your phone on download mode and try this fastboot command:
fastboot reboot recovery
or
fastboot reboot bootloader

then try:
List all disabled apps:

[email protected]:/ # pm list packages -d
package:com.android.calculator2
package:com.google.android.apps.inputmethod.hindi
package:jp.co.omronsoft.iwnnime.ml
package:com.google.android.inputmethod.pinyin
package:com.google.android.inputmethod.korean
package:com.google.earth
[email protected]:/ #

and tell me what apps are disabled.

 

[jrdef]

Well it could be the problem. The problem is that with a unlocked phone (via TWRP) we can use ADB commands.
Put your phone on download mode and try this fastboot command:
fastboot reboot recovery
or
fastboot reboot bootloader

then try:
List all disabled apps:

[email protected]:/ # pm list packages -d
package:com.android.calculator2
package:com.google.android.apps.inputmethod.hindi
package:jp.co.omronsoft.iwnnime.ml
package:com.google.android.inputmethod.pinyin
package:com.google.android.inputmethod.korean
package:com.google.earth
[email protected]:/ #

and tell me what apps are disabled.

Yeah, sadly my device is locked, but thanks for the tip. Well if you have any other ideas I would really be grateful. At the moment I really wanting to try to boot in safe mode but couldn't