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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.

Snapdragon firmware for usa g935u

Hi community, this is a good forum for the SM-G935U as well.
Someone who have the G935U need to try the G9350 TWRP RECOVERY, it supposed to be an UNLOCK BOOTLOADER. I have 4 of the G935T phones but no G935U, also I have the original TWRP RECOVERY for G935T. Maybe that RECOVERY will work on the G935U model. There's a link for TMB-G935U firmware, Sprint SPR-G935U, Verizon VZW-G935U firmware and International G935U firmware. I will upload the latest firmware for US VERSION. ENJOY FELLAS!!!
INT https://www.androidfilehost.com/?fid=312968873555004047
SPR https://www.androidfilehost.com/?fid=24591000424959740
VZW https://www.androidfilehost.com/?fid=24591000424959742
TMB https://www.androidfilehost.com/?fid=457095661767103220

These are carrier phones not unlocked G935u. Tmobile is G935t, ATT 35A, etc you can see the numbering. These are all locked bootloaders. And they have seperate carrier threads also.
Trav
PS: Can you Carrier people that are rooted use flashfire and flash kernels? Or is that broken? What about odin? I need more information if you want roms and kernels.

travis82 said:
These are carrier phones not unlocked G935u. Tmobile is G935t, ATT 35A, etc you can see the numbering. These are all locked bootloaders. And they have seperate carrier threads also.
Trav
PS: Can you Carrier people that are rooted use flashfire and flash kernels? Or is that broken? What about odin? I need more information if you want roms and kernels.
Click to expand...
Click to collapse
On t mobile. We can flash roms via flashfire but I don't think we can flash kernels cause our locked bootloader. Only 1 rom available for us on a carrier device. I would LOVE to see some new roms. Also I can be a Tester if you don't have one.
Sent from my SM-G935U using Tapatalk

what if you flash a zip to update the kernel blob not the whole boot.img so ramdisk stays untouched? can you flash something like this in flashfire?

travis82 said:
what if you flash a zip to update the kernel blob not the whole boot.img so ramdisk stays untouched? can you flash something like this in flashfire?
Click to expand...
Click to collapse
Not sure to be honest. We are using a sprint debug boot.img for root so I imagine it can be tweaked
Edit: link to our root method
http://forum.xda-developers.com/showthread.php?t=3410470
Sent from my SM-G935U using Tapatalk

could be great you can develop for 935T TMO a Full Note 7 Port rom
We can be your Beta Tester

You release it I'll test it on my tmobile variant
travis82 said:
what if you flash a zip to update the kernel blob not the whole boot.img so ramdisk stays untouched? can you flash something like this in flashfire?
Click to expand...
Click to collapse

Recently rooted a SM-G935T using the "High-on-android" tutorial. Battery and performance was horrible, until I flashed the Echoe ROM using FlashFire. Flashing the ROM also changed the model number to SM-G935U.

woodstock101 said:
Recently rooted a SM-G935T using the "High-on-android" tutorial. Battery and performance was horrible, until I flashed the Echoe ROM using FlashFire. Flashing the ROM also changed the model number to SM-G935U.
Click to expand...
Click to collapse
What version of Echo did you flash? And did it get rid of all the lag and battery drain so its like stock again?

CosMiiK said:
What version of Echo did you flash? And did it get rid of all the lag and battery drain so its like stock again?
Click to expand...
Click to collapse
I flashed G935 v1 and yes, It's very much like stock again.

woodstock101 said:
I flashed G935 v1 and yes, It's very much like stock again.
Click to expand...
Click to collapse
I mean v1.xx? v1.50 is the newest but isn't really ready for the G935t. I think 1.40 or 1.41 were the newest versions that work on tmo. The last time I used Echo it was an early version and it had a lot of issues.

CosMiiK said:
I mean v1.xx? v1.50 is the newest but isn't really ready for the G935t. I think 1.40 or 1.41 were the newest versions that work on tmo. The last time I used Echo it was an early version and it had a lot of issues.
Click to expand...
Click to collapse
v1.20. I've been running it for a couple of days. So far, the only issue I've encountered is with the internet browser's secret mode. Sometimes it hangs.

language
hi. i have g935U i'm living in Turkey. But Turkish language not in this phone. How i can do it language turkish? Is G935U have europe rom for turkish?

woodstock101 said:
Recently rooted a SM-G935T using the "High-on-android" tutorial. Battery and performance was horrible, until I flashed the Echoe ROM using FlashFire. Flashing the ROM also changed the model number to SM-G935U.
Click to expand...
Click to collapse
Does the Echoe rom use the U baseband? It must if it changed it or maybe the APK1 CSC MODWM file perhaps.

Baseband is now showing G935TUVU4APIA. I'm not sure what is was before, but guessing it didnt change because of the "T" in the G935T.

Okay so I have this Samsung Galaxy S7 Edge G935U TMobile Version.
What I NEED to know is when using Odin to flash these files which files go to PDA, or PHONE?
Is the AP file for the PDA slot or PHONE slot?
Thank you for your help in advance.

Possible to Flash G930AZ (Cricket) with G930T (T-Mobile)?

Short question:
Can I flash G930T firmware into a G930AZ Galaxy S7? Have someone tried or accomplished this? If so, how?
Explanation:
I have a cricket wireless branded Galaxy S7, since cricket does not seem to have any interest in releasing android 7 nougat anytime soon, I decided to flash another firmware...
I was planing on using the G930U, but since that one is not available either, I resolved to put up with T-mobile's bloatware;
I tried:
To flash all 4 files from T-mobile's firmware on ODIN
Result: I got an error saying the ext4 file was too big, the device got soft bricked and stuck in a bootloop to recovery, I had to factory reset using the G930AZ files on ODIN
Only the AP file
Result: Same as above
I've read in some forums that I should try to enable the reformat option so it wipes all and creates the partitions with the right size and while that makes absolute sense I don't want to end up with a $600 paperweight.
There's the NAND Erase all option, Flash Lock, T Flash, Phone Bootloader Update and Phone EFS Clear.
Also, I was wondering if it was possible to mix and match files, example: flash the AP file from T-Mobile's Nougat while keeping the CSC and CP of Cricket (CSC: Cricket does not support Wi-Fi calling, CP: To avoid problems with unsupported bands)
I have the BL, AP , CP, CSC files of both the cricket's Android 6 and T-mobile's Android 7.
Thanks you in advance for your time and effort in answering

You should consider on using .PIT file along with others.
Therefore you will remap your partitions to match filesystem sizes.
But I must warn you: do not mess with the partitions if YOU DON'T KNOW WHAT YOU'RE DOING.
Enviado desde mi SM-N920F mediante Tapatalk

PIT file origin
worf_1977 said:
You should consider on using .PIT file along with others.
Therefore you will remap your partitions to match filesystem sizes.
But I must warn you: do not mess with the partitions if YOU DON'T KNOW WHAT YOU'RE DOING.
Enviado desde mi SM-N920F mediante Tapatalk
Click to expand...
Click to collapse
If I use the latest version of ODIN do I still have to get the PIT file? If so, where do I get the PIT file from?

eldavid39 said:
If I use the latest version of ODIN do I still have to get the PIT file? If so, where do I get the PIT file from?
Click to expand...
Click to collapse
In theory it's inside one of the .MD5 files you must use in ODIN.
Try to download official trusted firmware package source such as one from sammobile.com or updato.com and follow the instructions to flash it
Enviado desde mi SM-G935F mediante Tapatalk

Any update on this? I'm in the same boat and want to flash T-Mobile rom to G930AZ.

[GUIDE]: Flash Oreo (G950FXXU1CRB7) using new Odin (3.13.1)

New Odin version was leaked!
Odin 3.13.1
This version of Odin allows you to flash newer firmwares with compressed binaries (lz4).
How to flash G950FXXU1CRB7
Download G950FXXU1CRB7 firmware using SamFirm (Model: SM-G950F; Region: DBT; Auto; Check CRC32; Decrypt Automatically; then press "Check Update" and "Download")
Extract downloaded ZIP file
Open Odin and load corresponding package to each slot (BL, AP, CP, CSC)
Put your phone into Download Mode, connect it to the computer using USB cable and press "Start"
There is no need to repack the firmware anymore.
Attached files:
Odin3_v3.13.1.zip
SHA256: 5855ed03a02b03ffcf28ba691236dbffc2e429841f952e904048378dd1bec265
MD5: e52ec5982122f73449f63e8e2b2c9cda
Credits:
Thanks to @bazylek78 for sharing a link to 4pda.ru forum

kernel.killer said:
New Odin version was leaked!
Odin 3.13.1
This version of Odin allows you to flash newer firmwares with compressed binaries (lz4).
How to flash G950FXXU1CRB7
Download G950FXXU1CRB7 firmware using SamFirm (Model: SM-G950F; Region: DBT; Auto; Check CRC32; Decrypt Automatically; then press "Check Update" and "Download")
Extract downloaded ZIP file
Open Odin and load corresponding package to each slot (BL, AP, CP, CSC)
Put your phone into Download Mode, connect it to the computer using USB cable and press "Start"
There is no need to repack the firmware anymore.
Attached files:
Odin3_v3.13.1.zip
SHA256: 5855ed03a02b03ffcf28ba691236dbffc2e429841f952e904048378dd1bec265
MD5: e52ec5982122f73449f63e8e2b2c9cda
Credits:
Thanks to @bazylek78 for sharing a link to 4pda.ru forum
Click to expand...
Click to collapse
For s8 plus?
Sent from my SM-G955F using Tapatalk

thahim said:
For s8 plus?
Sent from my SM-G955F using Tapatalk
Click to expand...
Click to collapse
Sure, just change SM-G950F to SM-G955F in SamFirm.

Ive a Galaxy s8 plus unlocked exynos.
Im from Portugal. Ive to Change anything or that region works?

southgaia said:
Ive a Galaxy s8 plus unlocked exynos.
Im from Portugal. Ive to Change anything or that region works?
Click to expand...
Click to collapse
DBT region receives firmware with OXM multi-CSC, which also includes TPH CSC (Portugal), so there should not be any issues.

Flash
I loaded the .tar files into Odin.
Auto Reboot is checked.
F.Reset Time is checked.
Everything else is unchecked.
After my phone boots into download mode do i have to press anything on it or i just press start on Odin ?
The only phone that i have flashed was my Galaxy S in 2010 and i haven't done anything like this before.

If I do this, will I receive ota updates in the future?

Atomsk said:
If I do this, will I receive ota updates in the future?
Click to expand...
Click to collapse
yes you will.

Phones , Laptops software fix
I m from lebanon
My S8 SM-G950FD with CSC MID
Can i install oreo dbt region

Avoid data loss
kernel.killer said:
New Odin version was leaked!
Odin 3.13.1
This version of Odin allows you to flash newer firmwares with compressed binaries (lz4).
How to flash G950FXXU1CRB7
Download G950FXXU1CRB7 firmware using SamFirm (Model: SM-G950F; Region: DBT; Auto; Check CRC32; Decrypt Automatically; then press "Check Update" and "Download")
Extract downloaded ZIP file
Open Odin and load corresponding package to each slot (BL, AP, CP, CSC)
Put your phone into Download Mode, connect it to the computer using USB cable and press "Start"
There is no need to repack the firmware anymore.
Attached files:
Odin3_v3.13.1.zip
SHA256: 5855ed03a02b03ffcf28ba691236dbffc2e429841f952e904048378dd1bec265
MD5: e52ec5982122f73449f63e8e2b2c9cda
Credits:
Thanks to @bazylek78 for sharing a link to 4pda.ru forum
Click to expand...
Click to collapse
Is there a way to avoid data loss installing the firmware with odin?

Daelors said:
Is there a way to avoid data loss installing the firmware with odin?
Click to expand...
Click to collapse
Use HOME_CSC not CSC, however, if there would be any issue during the upgrade, the storage would show only 16GB and you would have to do a factory reset anyway. If you are going to try to do the upgrade, I strongly recommend backing up your data.

Charbel1979 said:
I m from lebanon
My S8 SM-G950FD with CSC MID
Can i install oreo dbt region
Click to expand...
Click to collapse
Yes, the firmware for any regions included within OXM multi-CSC is the same.

For variant G950FD i neeed to use this same firm, right?
EDIT: i did this method and works fine. But the baseband was not to be CRB7? My phone says baseband G950FXXU1CRAP and the compilation number said R16NW.GF50FXXU1CRB7. Does its good?

afranioneto said:
For variant G950FD i neeed to use this same firm, right?
EDIT: i did this method and works fine. But the baseband was not to be CRB7? My phone says baseband G950FXXU1CRAP and the compilation number said R16NW.GF50FXXU1CRB7. Does its good?
Click to expand...
Click to collapse
Yes, that's right. Samsung did not update modem firmware or CSC package. Only bootloader and AP (system) were updated.

I flashed Oreo CRB7 final build from Germany and everything is great. But notifications for viber doesnt work as supposed. When i snooze them for only 15 minutes they never appear again and even after 2 hours when i open viber app i have new messages for which i didnt get notification neither sound and stays like that. But when i restart phone everything becomes normal untill i snooze some notification again. I did clean install, clear cash twice and factory reset the phone before Oreo.
Followed the instructions from this site step by step (it was flashing with extracting .lz4 extensions). Help?

Odin (3.13.1)
I can't find the download link for Odin (3.13.1). Please help??

is it just me or the battery life is just better?

Wipe the phone after flashing?
Something goes away?
SM-G950FD Exynos Dual Sim (My phone)

skaveesh said:
I can't find the download link for Odin (3.13.1). Please help??
Click to expand...
Click to collapse
Download Odin 3.13.1: https://forum.xda-developers.com/attachment.php?attachmentid=4431597&d=1519662712

for clean flash, choose home_csc or csc?

Cant find AP for Samsung A530WVLS1ARD1

As in the title I cant find the appropriate AP file for use with odin. My device is a Samsung A8 7.1.1 SM- A530WVLS1ARD1. I tried to redo the AP using A530WLVU1ARD2 and it does not work!
Help is appreciated!!

Swishcoe said:
As in the title I cant find the appropriate AP file for use with odin. My device is a Samsung A8 7.1.1 SM- A530WVLS1ARD1. I tried to redo the AP using A530WLVU1ARD2 and it does not work!
Help is appreciated!!
Click to expand...
Click to collapse
Ok why are you downloading 7.1.1, oreo recently came out for a8 canada already

idk
as long as it is A530Wx it will work or must it be exactly the same??

?
587.saboor said:
Ok why are you downloading 7.1.1, oreo recently came out for a8 canada already
Click to expand...
Click to collapse
can you show me a guide I can use to reset the phone?
The problem is the FRP lock

Swishcoe said:
can you show me a guide I can use to reset the phone?
The problem is the FRP lock
Click to expand...
Click to collapse
Flash full firmware from updato, BL, AP, CP, and CSC, NOT HOME_CSC

587.saboor said:
Flash full firmware from updato, BL, AP, CP, and CSC, NOT HOME_CSC
Click to expand...
Click to collapse
Ok, where can I find the firmware I am having difficulty. Do I use all the same firmware on all the categories or there is a different one for each?

Swishcoe said:
Ok, where can I find the firmware I am having difficulty. Do I use all the same firmware on all the categories or there is a different one for each?
Click to expand...
Click to collapse
I literally just told you, from updato