How To Guide F926U and F926U1 Firmware Links and Flashing Discussion Here

[iBowToAndroid]

For those who aren't already aware, F926U is the model number of all of the US carrier versions of the Z Fold3. The F926U1 is the model number of the same device, but sold by Samsung SIM unlocked and with no carrier bloatware. Firmware is 100% interchangeable among these models: any U or U1 firmware version can be flashed to any U or U1 device at any time, assuming that you're not trying to downgrade the bootloader. A "U to U" or "U1 to U1" flash does not require a factory reset, but changing from one firmware to the other will require one. Also, U firmware is identical for the 4 base files (AP, BL, CP, CSC) for each individual build, no matter which carrier it comes from. So if you download 2 different carrier versions of the exact same build, the 4 base files will be identical. Where the firmware differs is in the USERDATA file - that's where the carrier bloatware and customizations reside.

Manual Odin flashing is designed for those who:

- want to manually update to a newer version of U firmware on their U device, either because they don't want to wait for their carrier's OTA or because OTAs aren't working on their device, or a different carrier got a new feature/patch before they did
- want to flash U1 firmware to their U device
- want to convert from U1 firmware to carrier U firmware
- want to convert from one carrier's U firmware (with all apps and bloatware) to a different carrier's U firmware (with all apps and bloatware)

For those who aren't already aware, anyone can now download firmware for almost any Samsung device any time that they want, via the various firmware download tools posted here on XDA like SamFirm or Frija. There are threads and info about them here on XDA so I won't waste time explaining - do a search if you're not already familiar with these tools. But they only provide whatever the latest/newest/current version is - nothing older. I have access to an internal Samsung firmware download tool that usually gets new versions before they hit the public firmware download tools, so that's where my files come from.

This is not a "beginner's guide to Odin flashing" -type post/thread, so I won't list basic, step-by-step flashing instructions. My threads are geared towards those who already know what they're doing. If you're new to manually flashing Samsung firmware (or haven't done it in a long time), I recommend you consult one of those "beginner's" guides- there are tons of them here on XDA.

Happy flashing!

U firmware: https://www.androidfilehost.com/?w=files&flid=327754
U1 firmware: https://www.androidfilehost.com/?w=files&flid=327755

Notes:

- DON'T QUOTE THE OP WHEN YOU REPLY, kthx

- I have lots of threads just like this one for other Samsung flagships, if it interests you. For those who have already made use of my previous threads for a different device and are upgrading, welcome back

- My zips are compressed extra small for space and bandwidth savings. The default Windows extractor can't handle it, so you'll need a 3rd party tool like 7zip, WinRAR, etc

- it's quite time consuming to download the files, zip them up, and upload them to AFH. And, I do threads like this for every single flagship model, so I won't be uploading every single version. The only full builds that I upload are ones where I get access to a new bootloader and/or Android version early, before they hit the firmware download tools.

- My naming method for folders on AFH is: build - bootloader - Android version
So "SAT - 1 - 9.0" means the full build number ends in SAT, it's bootloader version 1, and it's Android 9.0. When bootloader and Android versions increment, the first build to have those changes will have its folder notated appropriately.

- HOME CSC file keeps data intact; using the other CSC will wipe data. Flashing USERDATA will also wipe data.

- Since AT&T doesn't allow their firmware to be publicly available (for any of their devices), I'll try to always upload at least one USERDATA per bootloader increment for AT&T (and Cricket, if they get this model). I'll also upload any full builds if AT&T is the only carrier to get that specific build, because you won't be able to find the files anywhere else.

- For identifying USERDATAS, and to know what region/CSC to use in the firmware download tools if you're downloading yourself:

AIO = Cricket (not available via firmware download tools)
ATT = AT&T (not available via firmware download tools)
BST = Boost Mobile
CCT = Xfinity Mobile (Comcast)
CHA = Spectrum Mobile (Charter)
DSH = Dish Network
TMB = T-Mobile
TMK = Metro PCS
USC = US Cellular
VZW = Verizon (available via firmware download tools, but Manual Entry is required - Auto will not work)
XAA = U1 firmware

 

[ruthlessnature]

Is there a T-Mobile version available yet?

 

[iBowToAndroid]

Is there a T-Mobile version available yet?

Yep, firmware has been on Samsung's servers since last week

 

[ruthlessnature]

Yep, firmware has been on Samsung's servers since last week

I downloaded the file from samefirm, and frija but did not get the carrier bloat or T-Mobile boot screen from either one. I have an unlocked version.

 

[iBowToAndroid]

I downloaded the file from samefirm, and frija but did not get the carrier bloat or T-Mobile boot screen from either one. I have an unlocked version.

You need to make sure your CSC shows as TMB, and need to make sure you're flashing USERDATA too

 

[ruthlessnature]

You need to make sure your CSC shows as TMB, and need to make sure you're flashing USERDATA too

That's strange, neither one I downloaded has TMB in the csc, do you have a link ?

 

[iBowToAndroid]

That's strange, neither one I downloaded has TMB in the csc, do you have a link ?

I'm not talking about the firmware. I'm talking about the phone itself, in the Settings

 

[ruthlessnature]

Oh, I see, it doesn't change, shows xaa/xaa/xaa I downloaded the ATT userdata to flash and see if it changes it.

 

[iBowToAndroid]

Oh, I see, it doesn't change, shows xaa/xaa/xaa I downloaded the ATT userdata to flash and see if it changes it.

If you want T-Mobile bloatware, you need to insert a T-Mobile SIM so that the CSC changes to TMB. And then you need to flash a U firmware with T-Mobile USERDATA

 

[ruthlessnature]

If you want T-Mobile bloatware, you need to insert a T-Mobile SIM so that the CSC changes to TMB. And then you need to flash a U firmware with T-Mobile USERDATA

Thanks for the info, I couldn't get it to flash back to the u1 firmware until I downloaded the patched Odin. Then I was able to I put my Sim, the csc showed TMB and then I was able to flash the u firmware with the TMB userdata. Thanks again for your help.

 

[iBowToAndroid]

Thanks for the info, I couldn't get it to flash back to the u1 firmware until I downloaded the patched Odin. Then I was able to I put my Sim, the csc showed TMB and then I was able to flash the u firmware with the TMB userdata. Thanks again for your help.

You're welcome!

 

[wschamps42]

Thanks for the info, I couldn't get it to flash back to the u1 firmware until I downloaded the patched Odin. Then I was able to I put my Sim, the csc showed TMB and then I was able to flash the u firmware with the TMB userdata. Thanks again for your help.

For anyone looking for that it's here: https://xdaforums.com/t/patched-odin-3-13-1.3762572/

 

[wschamps42]

I'm getting a weird Complete(Write) Operation Failed error when flashing any tips?

NVM gotta have USB Debugging on

 

[iBowToAndroid]

I'm getting a weird Complete(Write) Operation Failed error when flashing any tips?

NVM gotta have USB Debugging on

Uhhhh what? Flashing is done in Download mode, not Normal mode

 

[Drnms]

can we flash a different region firmWARE (UK / EUROPE) to the U1? Given the phones are all Qualcomm SD now

 

[iBowToAndroid]

can we flash a different region firmWARE (UK / EUROPE) to the U1? Given the phones are all Qualcomm SD now

Nope

 

[sllong]

I appologize for being the super noob. A couple questions.

Does using this process disable the cameras as mentioned in https://xdaforums.com/t/unlocking-bootloader-will-disable-the-camera.4321957/page-.

You stated that there are tons of beginners guides. In doing searches I find multiple different guides with different completely different processes. Is there one that you recommend or works best?

My goal is to make my unlocked fold3 more usable on ATT/firstnet. There are multiple features I cannot use and I don't receive same call quality service as my wife's locked att fold3.

 

[nrage23]

I appologize for being the super noob. A couple questions.

Does using this process disable the cameras as mentioned in https://xdaforums.com/t/unlocking-bootloader-will-disable-the-camera.4321957/page-.

You stated that there are tons of beginners guides. In doing searches I find multiple different guides with different completely different processes. Is there one that you recommend or works best?

My goal is to make my unlocked fold3 more usable on ATT/firstnet. There are multiple features I cannot use and I don't receive same call quality service as my wife's locked att fold3.

You will not lose the cameras as you are flashing firmware not unlocking the bootloader.

 

[iBowToAndroid]

My goal is to make my unlocked fold3 more usable on ATT/firstnet. There are multiple features I cannot use and I don't receive same call quality service as my wife's locked att fold3.

Under Settings-->About-->Software Information, what's the last line of your "Service provider SW ver" item?

 

[sllong]

Under Settings-->About-->Software Information, what's the last line of your "Service provider SW ver" item

/xaa/xaa/xaa