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

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supersonic64126

Senior Member
Nov 1, 2008
77
29
Naples WE-FINALLY-HAVE-LTE FL!
Where you able to flash XAA and did it reset your phone ?

Read this post maybe some help for u there ?

Yes I flashed XAA and yes it reset my phone. My model number is now U1 and no carrier bloatware, but also no WiFi calling on Verizon but my software is still showing TMB/TMB/XAU. No matter what I flash it's stuck on TMB. And as long as it's on TMB I can't get WiFi calling on Verizon. That seems to be pretty well confirmed. The original post here gave an example with switching from one carrier's firmware to another, but that doesn't seem to be an option on these phones. I'll look at the link you posted thank you.
 

kootebi

Member
Mar 25, 2011
16
0
Yes I flashed XAA and yes it reset my phone. My model number is now U1 and no carrier bloatware, but also no WiFi calling on Verizon but my software is still showing TMB/TMB/XAU. No matter what I flash it's stuck on TMB. And as long as it's on TMB I can't get WiFi calling on Verizon. That seems to be pretty well confirmed. The original post here gave an example with switching from one carrier's firmware to another, but that doesn't seem to be an option on these phones. I'll look at the link you posted thank you.
Hi can you please let me know where did you download the XAA U1 firmware? I found lots of XAA variants: https://www.sammobile.com/samsung/galaxy-z-fold-3/firmware/SM-F926U1/XAA/#SM-F926U1
Thanks.
 

supersonic64126

Senior Member
Nov 1, 2008
77
29
Naples WE-FINALLY-HAVE-LTE FL!
Hi can you please let me know where did you download the XAA U1 firmware? I found lots of XAA variants: https://www.sammobile.com/samsung/galaxy-z-fold-3/firmware/SM-F926U1/XAA/#SM-F926U1
Thanks.
I got the latest from Frija. I went back to T-Mobile. I thought Verizon coverage would be more reliable but it's just as bad as T-Mobile, except Verizon's 5G gets me 2mbps if I'm lucky in my city where with T-Mobile I get 400mbps+ regularly, and for less than half the cost. And no WiFi calling was the deal killer for me. As soon as I popped the T Mobile sim back in WiFi calling reappeared and works perfectly. I'm going to stay on the XAA and T Mobile for now. If we ever get esim I'll probably add a Verizon or ATT sim as backup just in case one has signal and the other doesn't. It seems the CSC can't be changed on these phones through flashing like the OP said. At least not on the carrier version and not without rooting. And Verizon seems to be the issue, they obviously do their WiFi calling differently than the other carriers, only allowing access on their version of the phone. And I'm not buying another $1800 phone for at best a marginal improvement in coverage.
 
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kootebi

Member
Mar 25, 2011
16
0
I purchases carrier locked through ATT(U). I flashed U1(XAA -AP, BL, CP, & CS) to remove bloatware & booted fine. But, version still said ATT/ATT/ATT/(not a problem because bootloader & device is locked?). If I want to revert to "stock" ATT, I would flash U with AP, BL, CP, CS, & USERDATA together?

Thanks,
Julio
Hi Where did you find the ATT U firmware? Did you see any problems after you flashed ATT version to XAA? Thanks.
 

Who-Lep

Senior Member
Apr 7, 2012
251
68
Hi Where did you find the ATT U firmware? Did you see any problems after you flashed ATT version to XAA? Thanks.
The links for the AT&T files are in the OP under U Firmware. Navigate to the UG8 - 1 - 11.0 folder and download and extract to use in the modified Odin.

I didn't notice any major difference, it just a debloated AT&T phone. I did have to adjust my APN settings to improve network connections. I've switched several times between the AT&T, XAA, & beta and everything has been working fine.
 

kootebi

Member
Mar 25, 2011
16
0
The links for the AT&T files are in the OP under U Firmware. Navigate to the UG8 - 1 - 11.0 folder and download and extract to use in the modified Odin.

I didn't notice any major difference, it just a debloated AT&T phone. I did have to adjust my APN settings to improve network connections. I've switched several times between the AT&T, XAA, & beta and everything has been working fine.
Thanks, I flashed XAA today, now my mint / tello SIM shows 5G.
 

yygemmi770

Member
Aug 17, 2021
48
1
are there any OYM csc available for U package. Also, I cannot find Sprint anywhere. Does it not exist because it's all T-mobile now
 

ATT-Half

Member
Nov 26, 2008
30
4
I updated my firmware with odim patched
people flash home csc to avid losing your data.

NO esim support
 

iBowToAndroid

Senior Member
Nov 9, 2010
4,899
1
1,560
Twin Cities MN
AT&T USERDATA for Android 12 has been uploaded to the link in the OP - build UL7. Other carriers are getting this build also so the rest of the files will be readily available in lots of other places if needed
 
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  • 1
    I successfully grabbed the OTA via Frija and flashed to my Z Fold 3 (and my Flip 3 if anyone has both).

    My Z Fold 3 is factory unlocked U1 unit and my Z Flip is a T-Mobile USA locked variant.
    1
    AT&T USERDATA for Android 12 has been uploaded to the link in the OP - build UL7. Other carriers are getting this build also so the rest of the files will be readily available in lots of other places if needed
  • 9
    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
    2
    I guess what I'm asking is isn't there a way to just simply flash one of the US firmware's like XAA = U1 firmware or the CCT = Xfinity to enable the proper US frequency bands on a Physical dual sim international phone ?
    Nope. If you want US firmware, get a US phone
    1
    Is there a T-Mobile version available yet?
    Yep, firmware has been on Samsung's servers since last week
    1
    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
    1
    AT&T USERDATA for Android 12 has been uploaded to the link in the OP - build UL7. Other carriers are getting this build also so the rest of the files will be readily available in lots of other places if needed