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Firmware files - what are the AP, BL, files for?

So I downloaded the latest XSA update which came out yesterday on SamMobile, and flashed all four files - only to find that my phone had been wiped, including my /data partition :'(
So my question is - what are the four categories of files to flash in Odin (AP, BL, CSC, HOME)? And which one is responsible for me losing my data?

If you flash CSC will wipe your data. If you flash CSC_HOME will not wipe your data.
AP: is your system partition with recovery and stuff.
BL: your bootloader
CP: your modem
CSC: this is what features you get in some countries or carriers like Wi-Fi Calling.

Eurofighter_ty said:
If you flash CSC will wipe your data. If you flash CSC_HOME will not wipe your data.
AP: is your system partition with recovery and stuff.
BL: your bootloader
CP: your modem
CSC: this is what features you get in some countries or carriers like Wi-Fi Calling.
Click to expand...
Click to collapse
Thanks for that. So can I flash the CSC file under CSC_HOME?
Sent from my SM-G930F using Tapatalk

Yes. In the CSC slot you put the HOME_CSC file
Sent from my SM-G930F using Tapatalk

Eurofighter_ty said:
Yes. In the CSC slot you put the HOME_CSC file
Click to expand...
Click to collapse
And if the CSC is the same, I can just omit this file?

tangcla said:
And if the CSC is the same, I can just omit this file?
Click to expand...
Click to collapse
No, you must always flash the 4 files!
If your CSC is XSA:
AP, BL, CP & HOME_CSC_XSA
Then your data will stay intact!
Note: this can only be done if you stay at the same CSC; if you want to change your CSC for any reason, you need to flash CSC-file of the new country/region (that will reset your device)

Re-partition?
Do I have to enable the "RE-PARTITION" option in ODIN when changing CSC?
henklbr said:
No, you must always flash the 4 files!
If your CSC is XSA:
AP, BL, CP & HOME_CSC_XSA
Then your data will stay intact!
Note: this can only be done if you stay at the same CSC; if you want to change your CSC for any reason, you need to flash CSC-file of the new country/region (that will reset your device)
Click to expand...
Click to collapse

eldavid39 said:
Do I have to enable the "RE-PARTITION" option in ODIN when changing CSC?
Click to expand...
Click to collapse
Hi mate
It is recommended , changing to a total different CSC may need a change in partition size...
For more info read here
https://www.sammobile.com/forum/showthread.php?t=30800

Mix and match?
Just wondering, could it be possible to mix and match?
Example: Flash the AP of T-Mobile and the CP of AT&T? To avoid incompatible band problems
MAX 404 said:
Hi mate
It is recommended , changing to a total different CSC may need a change in partition size...
For more info read here
Click to expand...
Click to collapse

eldavid39 said:
Just wondering, could it be possible to mix and match?
Example: Flash the AP of T-Mobile and the CP of AT&T? To avoid incompatible band problems
Click to expand...
Click to collapse
Hi
For what I understand all USA ( Snapdragon) versions are compatible , so that would possible BUT to be sure you should ask in the right forum , this is for the international version Exynos

What is the UMS
What is the UMS part of ODIN?

EVERYONE HAVING PROBLEMS TYPING EXIT
Before typing "setsid su<enter>?, type the following: "alias a='exit'<enter>" and THEN type "setsid su<enter>".
IF you do this, you can exit root shell by just "a<enter>", which is cake easy to do.

i made a mistake
cancel
i flashed bl instead of ap what should i do know because phone does't work anymore

I cant seem to find these firmware files anywhere anymore, can someone help me ? I need For Norway/Europe

stoffar87 said:
I cant seem to find these firmware files anywhere anymore, can someone help me ? I need For Norway/Europe
Click to expand...
Click to collapse
updato.com

Thanks
But how to I flash it. My brother has Galaxy S7 but he brings his phone to me and told me how do I flash it.
Fortunately I found this:
http://firmwarearena.com/howtoflash/how-to-flash-samsung-galaxy-s7-using-sp-flash-tool/
But I don't know how SP Flash tool works. Anyone?

haroonbro said:
But how to I flash it. My brother has Galaxy S7 but he brings his phone to me and told me how do I flash it.
Fortunately I found this:
http://firmwarearena.com/howtoflash/how-to-flash-samsung-galaxy-s7-using-sp-flash-tool/
But I don't know how SP Flash tool works. Anyone?
Click to expand...
Click to collapse
Read some threads, the instructions are literally everywhere, they are even under the download on sammobile site, which means you have not read anything

Better off using odin.

BL FAILED
Eurofighter_ty said:
If you flash CSC will wipe your data. If you flash CSC_HOME will not wipe your data.
AP: is your system partition with recovery and stuff.
BL: your bootloader
CP: your modem
CSC: this is what features you get in some countries or carriers like Wi-Fi Calling.
Click to expand...
Click to collapse
Hi
When i try to flash all 4 files together, ODIN fails, i unchecked BL and the flash passed, the phone working fine but i have a serious problem, my phone is French and i flashed Argentina region, now i lost IMEI and Baseband, please help. My phone is ( SM-G930F)
Note: 1. the S/N and IMEI is written on the box
2. I don't know anything about my previous CSC code and i have no idea which firmware was actually my original one.

BRAVE.DANDY said:
Hi
When i try to flash all 4 files together, ODIN fails, i unchecked BL and the flash passed, the phone working fine but i have a serious problem, my phone is French and i flashed Argentina region, now i lost IMEI and Baseband, please help. My phone is ( SM-G930F)
Note: 1. the S/N and IMEI is written on the box
2. I don't know anything about my previous CSC code and i have no idea which firmware was actually my original one.
Click to expand...
Click to collapse
Download XEF firmware for your phone, and flash all 4 files (BL, CP, AP and CSC). It should go back to normal state.

Galaxy S6 bricked

Hello everyone I am new here.
I have a problem. I need help. I accidently bricked the phone. Samsung galaxy s6 (smg920F) with wrong version of android. :crying:. I used odin3, i dont know how to see build number and version when the phone is bricked. Thank you in advance

dragonovak said:
Hello everyone I am new here.
I have a problem. I need help. I accidently bricked the phone. Samsung galaxy s6 (smg920F) with wrong version of android. :crying:. I used odin3, i dont know how to see build number and version when the phone is bricked. Thank you in advance
Click to expand...
Click to collapse
http://cdn.droidviews.com/wp-content/uploads/2015/03/Odin3_v3.12.7.zip Odin 3.12.7 (latest)
https://forum.xda-developers.com/galaxy-tab-s/general/tool-samfirm-samsung-firmware-t2988647 SamFirm 0.3.6 (latest)
http://samsung-usb-driver-for-mobile-phones.en.lo4d.com/download Samsung USB Drivers 1.5.63 (latest)
Install latest USB drivers, unpack lastest Odin3 and SamFirm. Use SamFirm to download latest firmware for your model, so put "SM-G920F" in "model" check "Auto" under that, put CSC code for your country in "Region", download it and then just flash it in Odin
Here you got full CSC codes list and also short guide how to use SamFirm
https://www.androidsage.com/2017/07...specific-product-code-csc-and-country-region/
How to root then? > CF-Auto-Root
How to get TWRP then? > latest TWRP
Customize? > Look my signature

rifek4 said:
http://cdn.droidviews.com/wp-content/uploads/2015/03/Odin3_v3.12.7.zip Odin 3.12.7 (latest)
https://forum.xda-developers.com/galaxy-tab-s/general/tool-samfirm-samsung-firmware-t2988647 SamFirm 0.3.6 (latest)
http://samsung-usb-driver-for-mobile-phones.en.lo4d.com/download Samsung USB Drivers 1.5.63 (latest)
Install latest USB drivers, unpack lastest Odin3 and SamFirm. Use SamFirm to download latest firmware for your model, so put "SM-G920F" in "model" check "Auto" under that. Then put CSC code for your country in "Region". Then just flash it in Odin
Here you got full CSC codes list:
Click to expand...
Click to collapse
thank you, it works as it should be :good: :victory:

dragonovak said:
thank you, it works as it should be :good: :victory:
Click to expand...
Click to collapse
No problem... I think that post will help in future to another no experienced users xD

I have another question. which program you recommend for rooting samsung galaxy s6

dragonovak said:
I have another question. which program you recommend for rooting samsung galaxy s6
Click to expand...
Click to collapse
Look my signature on what i'm. For you I prefer now flash CF_AutoRoot via Odin then latest TWRP also via Odin and follow my signature... For ROOT i'm using latest SuperSU SR3 in BINDSBIN mode with suhide for SafetyNet working and no problems with Synapse (look HERE for best settings).

Thak you , i root with odin3. I took root file from here (https://autoroot.chainfire.eu/ )now its done.

rifek4 said:
http://cdn.droidviews.com/wp-content/uploads/2015/03/Odin3_v3.12.7.zip Odin 3.12.7 (latest)
https://forum.xda-developers.com/galaxy-tab-s/general/tool-samfirm-samsung-firmware-t2988647 SamFirm 0.3.6 (latest)
http://samsung-usb-driver-for-mobile-phones.en.lo4d.com/download Samsung USB Drivers 1.5.63 (latest)
Install latest USB drivers, unpack lastest Odin3 and SamFirm. Use SamFirm to download latest firmware for your model, so put "SM-G920F" in "model" check "Auto" under that, put CSC code for your country in "Region", download it and then just flash it in Odin
Here you got full CSC codes list and also short guide how to use SamFirm
https://www.androidsage.com/2017/07...specific-product-code-csc-and-country-region/
How to root then? > CF-Auto-Root
How to get TWRP then? > latest TWRP
Customize? > Look my signature
Click to expand...
Click to collapse
odin seems not working for me it just do nothing. it just stop at setting up? any suggestion i came from ultimate nougat s8 port. and wanna flash stock firmware.

rifek4 said:
What doesn't working? How? What happenes...? You can give a little bit more information, im not Nostradamus. Normally it's working for everybody so...
Click to expand...
Click to collapse
i know the problem now... i was so f***** stupid reading every word in the instruction... forget to read the firmware iwas flashing... it was for my s4 i9505 firmware. thanks anyway forgive my stupidity.... hahaha

Baseband/Firmware?

I have a SM-G920F that is network unlocked (as far as I can tell...). I updated it to the latest stock firmware available at the time and since then I have had Lineage 14.1 installed which I regularly update (along with OpenGApps). The Baseband version is G920FXXU5ERA5 which I think was installed as part of the stock firmware?
I noticed a couple of days ago that there is a newer stock firmware which I think has a newer baseband - although I am a bit confused as to what the baseband actually is (modem firmware?). I think the latest for my S6 is G920FXXU6ERF5 from June 2018 although there seems to be firmware from September 2018 for the Vodafone varient?
Is it possible to install the latest Baseband independantly of the whole stock firmware? Is there a .zip available for this?

Download and run this;
https://forum.xda-developers.com/attachment.php?attachmentid=3803841&d=1467715462
When you open the program, type the values given here;
Model: SM-G920F
Region: XFA (it has the newest baseband firmware right now)
Auto: Selected
Manual: Unselected
Binary Nature: Selected
Check CRC32: Selected
Decrypt automatically: Selected
When you write and select options given above, press "Check Update" and then press "Download" to download factory firmware for your device.
Once the download has been finished, extract the zip file that you've downloaded via SamFirm.
After unzip it, download and run this Odin (even if you have another one);
https://forum.xda-developers.com/attachment.php?attachmentid=3804544&d=1467772303
When you open it, press CP and select file which starts with CP from downloaded (from Samfirm) and extacted zip folder.
Other sections (AP, CSC, etc) should be empty.
When you set the CP file to Odin, connect your phone in download mode.
After that, press Start. When Odin done the installation, phone will restart. When it is restarted, disconnect the cable.

forumber2 said:
Download and run this;
https://forum.xda-developers.com/attachment.php?attachmentid=3803841&d=1467715462
When you open the program, type the values given here;
Model: SM-G920F
Region: XFA (it has the newest baseband firmware right now)
Auto: Selected
Manual: Unselected
Binary Nature: Selected
Check CRC32: Selected
Decrypt automatically: Selected
When you write and select options given above, press "Check Update" and then press "Download" to download factory firmware for your device.
Once the download has been finished, extract the zip file that you've downloaded via SamFirm.
After unzip it, download and run this Odin (even if you have another one);
https://forum.xda-developers.com/attachment.php?attachmentid=3804544&d=1467772303
When you open it, press CP and select file which starts with CP from downloaded (from Samfirm) and extacted zip folder.
Other sections (AP, CSC, etc) should be empty.
When you set the CP file to Odin, connect your phone in download mode.
After that, press Start. When Odin done the installation, phone will restart. When it is restarted, disconnect the cable.
Click to expand...
Click to collapse
Thank you for the very detailed reply.
Will this break anything?
My device I think is region UK BTU so is there any difference in the baseband firmware for XFA region devices (South Africa I think?).
Obviously I don't want to break anything or trip anything that will cause something to stop working - i.e. SafetyNet
Thanks
Andy

ADB100 said:
Thank you for the very detailed reply.
Will this break anything?
My device I think is region UK BTU so is there any difference in the baseband firmware for XFA region devices (South Africa I think?).
Obviously I don't want to break anything or trip anything that will cause something to stop working - i.e. SafetyNet
Thanks
Andy
Click to expand...
Click to collapse
It's not gonna break anything.
The CSC difference doesn't affect the baseband :good:

forumber2 said:
It's not gonna break anything.
The CSC difference doesn't affect the baseband :good:
Click to expand...
Click to collapse
Thank you. I sucessfully updated the baseband firmware to G920FXXU6ERI1 yesterday using your instructions

ADB100 said:
Thank you. I sucessfully updated the baseband firmware to G920FXXU6ERI1 yesterday using your instructions
Click to expand...
Click to collapse
I have hotspot tethering problem with my s6 after flashing 17.1 los rom. Adviced to update baseband. Did you have any problem after update?

X2tandeta said:
I have hotspot tethering problem with my s6 after flashing 17.1 los rom. Adviced to update baseband. Did you have any problem after update?
Click to expand...
Click to collapse
By the way, my baseband version is as follows G920FXXU6ERL2

Question help: SM-a125U stuck in Hash of data does not match digest in descriptor

Previous android version: Android 11
Previous base-band version: A125USQU2BUG5
company: wireless cricket
In the context of flashing with the new firmware I used :
- Odin version: 3 v3.14
- Firmware used: Samfw.com_SM-A125U_USC_A125USQU2BUL1_fac_2

The error is related to the vbmeta check. Did you used a sock firmware or you have patched it with magisk? Btw i reccomend to use frija to download the firmware.
If i can suggest I would make this steps:
1) download latest firmware with frija
2) Flash the stock and see if it work
Otherwise if this not help:
1) download latest firmware with frija
2) patch the whole ap and not only boot.img with magisk
3) open odin and flash it using the patched ap on the ap slot
If nothing above works, I think you can try this... not sure it will work. Replace inside the ap the vbmeta.img with the attached one that have the disabled verified boot.

Oneplus# said:
The error is related to the vbmeta check. Did you used a sock firmware or you have patched it with magisk? Btw i reccomend to use frija to download the firmware.
If i can suggest I would make this steps:
1) download latest firmware with frija
2) Flash the stock and see if it work
Otherwise if this not help:
1) download latest firmware with frija
2) patch the whole ap and not only boot.img with magisk
3) open odin and flash it using the patched ap on the ap slot
If nothing above works, I think you can try this... not sure it will work. Replace inside the ap the vbmeta.img with the attached one that have the disabled verified boot.
Click to expand...
Click to collapse
Thanks for the reply.ok
1- The firmware is stock.
2- I didn't patch any of the files I got ( any recommended guide on how to proceed>?)
3- I' so new at this
But anyways, yesterday I kind of sorted out the stuck by adding BL file, and CSC file along the AP file to ODIN, the phone restarted ok but found out it hasn't been unlocked from the carrier yet, so I guess that by judging what u just said, there are few thing I need a guide to
- Flashing the stock
- Patching the AP file
Ps Frija opens up when executed, but it closes in less than 1 second. (Pc 's OS: win 10 enterprise 64 bits)

leonardo07746 said:
Thanks for the reply.ok
1- The firmware is stock.
2- I didn't patch any of the files I got ( any recommended guide on how to proceed>?)
3- I' so new at this
But anyways, yesterday I kind of sorted out the stuck by adding BL file, and CSC file along the AP file to ODIN, the phone restarted ok but found out it hasn't been unlocked from the carrier yet, so I guess that by judging what u just said, there are few thing I need a guide to
- Flashing the stock
- Patching the AP file
Ps Frija opens up when executed, but it closes in less than 1 second. (Pc 's OS: win 10 enterprise 64 bits)
Click to expand...
Click to collapse
When you flash with Odin you always need to use all the files provided on the stock firmware ap, bl, csc and cp. If u are upgrading you can use the home_csc instead of the csc file that will let you keep your data.
Are you sure you have installed the framework that Frija need?
For the ap patching, is only meant if you want root your phone, flashing the whole ap instead of the boot.img only will let you fix the vbmeta checks too.
Install the magisk app.
Open it and tap Install, it will ask for a file to patch, chose the ap file of the stock firmware you downloaded.
Final step, flash ap patched and the others (bl,csc,cp).
When you say unlocked by the carrier what do you mean? You have any sort of sim block? Or you only want remove your carrier apps and configs?

Oneplus# said:
When you flash with Odin you always need to use all the files provided on the stock firmware ap, bl, csc and cp. If u are upgrading you can use the home_csc instead of the csc file that will let you keep your data.
Are you sure you have installed the framework that Frija need?
For the ap patching, is only meant if you want root your phone, flashing the whole ap instead of the boot.img only will let you fix the vbmeta checks too.
Install the magisk app.
Open it and tap Install, it will ask for a file to patch, chose the ap file of the stock firmware you downloaded.
Final step, flash ap patched and the others (bl,csc,cp).
When you say unlocked by the carrier what do you mean? You have any sort of sim block? Or you only want remove your carrier apps and configs?
Click to expand...
Click to collapse
thanks for all that
- it s sim block

Oneplus# said:
When you flash with Odin you always need to use all the files provided on the stock firmware ap, bl, csc and cp. If u are upgrading you can use the home_csc instead of the csc file that will let you keep your data.
Are you sure you have installed the framework that Frija need?
For the ap patching, is only meant if you want root your phone, flashing the whole ap instead of the boot.img only will let you fix the vbmeta checks too.
Install the magisk app.
Open it and tap Install, it will ask for a file to patch, chose the ap file of the stock firmware you downloaded.
Final step, flash ap patched and the others (bl,csc,cp).
When you say unlocked by the carrier what do you mean? You have any sort of sim block? Or you only want remove your carrier apps and configs?
Click to expand...
Click to collapse
Mannn thanks!
I rooted my tab 5Se a long time ago and deleted the firmware files except the AP.
I got stuck on the same screen today when I re-locked my bootloader after a stock AP-only flash
Then I saw your reply here and got the rest of the files flashed and it worked and booted
And for those who are reading if you don't have a SIM on your tablet you don't need a CP that's why you won't find it in your firmware zip file
Cheerios

Question Broken AP patch - is TWRP out for this model yet?

Hey guys, I'm on an SM-F711B. Today when trying to update my rooted OS, I had Odin fail twice while trying to install the patched AP file. I also noticed that the patched AP file was about half the size of the original - 3.2gb instead of 8gb. I then tried to install with the stock AP file, but now (duh) it says the file system is corrupted and Android can't boot. Is there any way I can a) fix the patched AP file without access to my phone, or b) at least recover the files (especially images) from my device before having to factory reset? many thanks

Hi,
there's no twrp yet and I doubt that there will ever be. Can you download the firmware again and flash the stock rom to begin again?
Edit:
what size is the original AP file?

thanks for the response
is flashing the stock rom different from loading the stock AP/BL/CP/CSC from Odin? If so, how do I do it?
The AP file is 7.74 GB according to Windows

my AP file is 8.11 GB, which firmware are you trying to flash?
yes the stock rom is different words for stock firmware but if you've already flashed the CSC file (instead of HOME) then you've probably lost any photos as it wipes the storage

Oh, to clarify, I did flash HOME_CSC. my AP filename is AP_F711BXXS2CVG1_F711BXXS2CVG1_MQB53367836_REV00_user_low_ship_MULTI_CERT_meta_OS12.tar if that at all helps narrow down the firmware? I just got whatever was latest from Frija

can you install magisk on a friend or family phone and try patching the AP file again and check the patched file size? it should be slightly larger than the original AP file

Thanks for the advice. I tried patching on my partners phone, a Pixel 2XL. Magisk printed
Code:
-- Copying: super.img.lz4
! Process error
! Installation failed
Do I need to run the patch on another Z Flip 3? Or is this a sign that the AP file i got from Frija is corrupt? It's interesting that it failed during super, as Odin also failed during super when trying to install the patched version
Edit: Her phone was full. We've cleared up some space and I'm trying again

yes I think the firmware might have a gremlin in it, I'd try downloading from a different website and start again
Download Galaxy Z Flip3 5G SM-F711B (O2C) F711BXXS2CVG1 in Samfw - Samsung firmware download
Galaxy Z Flip3 5G SM-F711B (O2C - Czechia) F711BXXS2CVG1 S(Android 12) samsung firmware download all model, lastest, fast update, completely free and fast speed in Samfw.com ✅
samfw.com

Hi, I've managed to patch the AP file using my partners phone. It is slightly larger than the original AP file (on Android, 8.39 instead of 8.31 GB). Can I use this patched AP file on my Z Flip 3? or is it model-specific?

yes you can flash it...good luck!

OMG it worked!!!! thank you so so much for your help!

lesbianpinkie said:
OMG it worked!!!! thank you so so much for your help!
Click to expand...
Click to collapse
Wait - spoke too soon. phone boots, but in my file manager, Internal Storage is being shown as 0b / 0b, and no apps seem to be able to access it..... any idea what to do now?

this has happened to me before and in twrp I would choose repair file system, but of course we don't have twrp hmm. did you try flashing the stock AP file to see if that fixes it, then can root afterwards