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

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durag5

Member
Dec 24, 2008
45
4
Anyone able to upload the files again? it looks like U is missing and U1 USERDATA missing all but ATT.
 

cfish81

Member
May 26, 2013
19
8
lake forest
Hi guys. Been a few years since I've been on here.
My question is can I use a Tmobile version and flash it for Verizon?
Will everything function as a normal Verizon fold 3?
Buying used and tmobile is everywhere cheap. Unlocked and Verizon still high priced. Found phone and the watch 4 classic 46mm for $1000
This question maybe answered somewhere already, sorry if I missed it and thanks for your help!
 
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SleepyCat420

New member
Nov 25, 2021
1
0
Hi all! This is like my 2nd time flashing firmware(from att to u1) and it seems a bit different than the last time. I enlisted my brother's help, and it seems to have gone through successfully, but I'm worried as he said it would do the wipes and resets automatically, but my fold booted up with all my data still. I haven't found anything not working and it shoes as u1, but I am wondering if there are gonna be issues and what steps I should take? (Like reset and flash again or just factory reset?) And would it be bad to restore from my smartswitch backup on the u1? Thanks all!!
 

Markeee

Senior Member
Sep 29, 2012
1,227
259
South Florida
Hi guys. Been a few years since I've been on here.
My question is can I use a Tmobile version and flash it for Verizon?
Will everything function as a normal Verizon fold 3?
Buying used and tmobile is everywhere cheap. Unlocked and Verizon still high priced. Found phone and the watch 4 classic 46mm for $1000
This question maybe answered somewhere already, sorry if I missed it and thanks for your help!
I was wondering the same thing from what I understand after reading the first post in this thread seems all US carriers F926U versions along with the F926U1 version that Samsung sells the are basically the same phone and are all 100% interchangeable.
Best to read it yourself I'm a bit on the ADD side when it comes to reading and comprehending details
 
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cfish81

Member
May 26, 2013
19
8
lake forest
I was wondering the same thing from what I understand after reading the first post in this thread seems all US carriers F926U versions along with the F926U1 version that Samsung sells the are basically the same phone and are all 100% interchangeable.
Best to read it yourself I'm a bit on the ADD side when it comes to reading and comprehending details
For sure thanks for clarifying. I've been out of the game since the really old Note days when we had full unlocks and all the fun stuff.
I saw someone else mentioned the files op posted not all are there? I looked and see only one. I think that's why op said to use winrar or similar to unzip the files. Guessing they are all packed in there? I'm going to be looking for the Verizon stuff to get my visual voice mail working etc. And do away with the pink screen on boot lol. Wonder if these Verizon phone only apps will work on the unlocked version? Would be nice to do away with much of the bloat ware.
Want to get all my ducks in a row and send it hopefully only once
 

Markeee

Senior Member
Sep 29, 2012
1,227
259
South Florida
For sure thanks for clarifying. I've been out of the game since the really old Note days when we had full unlocks and all the fun stuff.
I saw someone else mentioned the files op posted not all are there? I looked and see only one. I think that's why op said to use winrar or similar to unzip the files. Guessing they are all packed in there? I'm going to be looking for the Verizon stuff to get my visual voice mail working etc. And do away with the pink screen on boot lol. Wonder if these Verizon phone only apps will work on the unlocked version? Would be nice to do away with much of the bloat ware.
Want to get all my ducks in a row and send it hopefully only once
I'm on a unlocked F926U1 Samsung version using Xfinity mobile which runs off Verizon network they have there own visual voice mail app that actually works pretty good. Working Visual voice mail is pretty important to me also
 
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martinisadork

Member
Mar 10, 2011
33
2
Texas
Quick question, Verizon disabled the samsung blockchain keystore on these phones for some reason.
Will flashing the U1 restore this functionality?

Also, is there anything lost, other than bloat, by doing this?
 

martinisadork

Member
Mar 10, 2011
33
2
Texas
Quick question, Verizon disabled the samsung blockchain keystore on these phones for some reason.
Will flashing the U1 restore this functionality?

Also, is there anything lost, other than bloat, by doing this?
I'll reply to myself as I tested it out: Flashing U1 without factory reset and without USERDATA keeps all verizon bloat but unlocks the blockchain keystore.
 

larsdennert

Senior Member
Dec 5, 2007
1,003
319
Quick question, Verizon disabled the samsung blockchain keystore on these phones for some reason.
Will flashing the U1 restore this functionality?

Also, is there anything lost, other than bloat, by doing this?
The u1 will prefer wifi calling even if you set cellular preferred. Not sure if the Verizon version has this bug but you can switch off wifi calling of course.
 

supersonic64126

Senior Member
Nov 1, 2008
77
29
Naples WE-FINALLY-HAVE-LTE FL!
So I've read through this thread completely probably 3 times already. I'm not sure what I'm missing. Trying to flash my Z Fold3 T-Mobile to Verizon U firmware. I've flashed Verizon firmware including CSC and User Data after inserting Verizon sim card. I've flashed U1 and tried inserting Verizon sim and rebooting to force the TMB to change to VZW. It doesn't. Every time I flash the VZW U firmware with UserData I get the T-Mobile boot screen after a successful flash, T-Mobile bloatware PLUS Verizon bloatware. I'm so confused, what am I doing wrong? Yes phone is sim unlocked.
 

Markeee

Senior Member
Sep 29, 2012
1,227
259
South Florida
So I've read through this thread completely probably 3 times already. I'm not sure what I'm missing. Trying to flash my Z Fold3 T-Mobile to Verizon U firmware. I've flashed Verizon firmware including CSC and User Data after inserting Verizon sim card. I've flashed U1 and tried inserting Verizon sim and rebooting to force the TMB to change to VZW. It doesn't. Every time I flash the VZW U firmware with UserData I get the T-Mobile boot screen after a successful flash, T-Mobile bloatware PLUS Verizon bloatware. I'm so confused, what am I doing wrong? Yes phone is sim unlocked.
I just flash the XAA = U1 firmware and include the normal CFC not the home CFC that will wipe reset your phone clean. I don't worry about user data leave it empty when I pop my sim in after that loads the user data I use the patched Odin3 v3.14.1_3B_PatcheD https://forum.xda-developers.com/t/patched-odin-3-13-1.3762572/
I'm on Xfinity Mobile which runs off VRZ and I get a pretty bloat free install with no carrier boot screen. I'm on the SM-F926U1 Samsung unlocked version but from the way i read this post there interchangeable U and U1
 
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supersonic64126

Senior Member
Nov 1, 2008
77
29
Naples WE-FINALLY-HAVE-LTE FL!
I just flash the XAA = U1 firmware and include the normal CFC not the home CFC that will wipe reset your phone clean. I don't worry about user data leave it empty when I pop my sim in after that loads the user data I use the patched Odin3 v3.14.1_3B_PatcheD https://forum.xda-developers.com/t/patched-odin-3-13-1.3762572/
I'm on Xfinity Mobile which runs off VRZ and I get a pretty bloat free install with no carrier boot screen. I'm on the SM-F926U1 Samsung unlocked version but from the way i read this post there interchangeable U and U1
Thanks. My issue is that I'm moving to Verizon, and the U1 firmware doesn't have WiFi calling. I need WiFi calling. I really don't care about the boot screen, but I'll tolerate it to get the Verizon firmware that will allow for WiFi calling on Verizon. But I can't get my CSC to change. Did your CSC change? Also what was your phone's original carrier? If Xfinity then you are basically in the same spot I'm in. If you flashed from a different carrier's firmware and managed to have your CSC updated to match the new carrier, then please tell me how!
 

Markeee

Senior Member
Sep 29, 2012
1,227
259
South Florida
Thanks. My issue is that I'm moving to Verizon, and the U1 firmware doesn't have WiFi calling. I need WiFi calling. I really don't care about the boot screen, but I'll tolerate it to get the Verizon firmware that will allow for WiFi calling on Verizon. But I can't get my CSC to change. Did your CSC change? Also what was your phone's original carrier? If Xfinity then you are basically in the same spot I'm in. If you flashed from a different carrier's firmware and managed to have your CSC updated to match the new carrier, then please tell me how!
The XAA has WiFi calling and I have the WiFi calling option after flashing it . I'm on the F926U1 Samsung unlocked version is has no carrier . The way I understand it is the XAA = U1 is just the bloat free firmware version that works on all US Carriers SM-F926U1 and SM-F926U phones . You need to use the use the patched Odin3 v3.14.1_3B_PatcheD https://forum.xda-developers.com/t/patched-odin-3-13-1.3762572/ and after you flash it and pop your VRZ sim it will get the VRZ UserData from off the sim. Just make sure to use the non home CFC file to wipe your phone clean
 
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supersonic64126

Senior Member
Nov 1, 2008
77
29
Naples WE-FINALLY-HAVE-LTE FL!
The XAA has WiFi calling and I have the WiFi calling option after flashing it . I'm on the F926U1 Samsung unlocked version is has no carrier . The way I understand it is the XAA = U1 is just the bloat free firmware version that works on all US Carriers SM-F926U1 and SM-F926U phones . You need to use the use the patched Odin3 v3.14.1_3B_PatcheD https://forum.xda-developers.com/t/patched-odin-3-13-1.3762572/ and after you flash it and pop your VRZ sim it will get the VRZ UserData from off the sim. Just make sure to use the non home CFC file to wipe your phone clean
That's exactly where I'm at now. Only difference is I started with the T Mobile US version, not the unlocked US version. That's probably why I have no WiFi calling and you do. It seems the T Mobile version the WiFi calling feature disappears the second you insert a non-Tmobile sim. I can't figure out a way to change the CSC. I'm so pissed, I can't believe I have an $1800 worthless brick. Anyway I'm glad you were able to get it to work. I should have gotten the unlocked version.
 

Markeee

Senior Member
Sep 29, 2012
1,227
259
South Florida
That's exactly where I'm at now. Only difference is I started with the T Mobile US version, not the unlocked US version. That's probably why I have no WiFi calling and you do. It seems the T Mobile version the WiFi calling feature disappears the second you insert a non-Tmobile sim. I can't figure out a way to change the CSC. I'm so pissed, I can't believe I have an $1800 worthless brick. Anyway I'm glad you were able to get it to work. I should have gotten the unlocked version.
Where you able to flash XAA and did it reset your phone ?

Read this post maybe some help for u there ?

 
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  • 1
    Thanks. My issue is that I'm moving to Verizon, and the U1 firmware doesn't have WiFi calling. I need WiFi calling. I really don't care about the boot screen, but I'll tolerate it to get the Verizon firmware that will allow for WiFi calling on Verizon. But I can't get my CSC to change. Did your CSC change? Also what was your phone's original carrier? If Xfinity then you are basically in the same spot I'm in. If you flashed from a different carrier's firmware and managed to have your CSC updated to match the new carrier, then please tell me how!
    The XAA has WiFi calling and I have the WiFi calling option after flashing it . I'm on the F926U1 Samsung unlocked version is has no carrier . The way I understand it is the XAA = U1 is just the bloat free firmware version that works on all US Carriers SM-F926U1 and SM-F926U phones . You need to use the use the patched Odin3 v3.14.1_3B_PatcheD https://forum.xda-developers.com/t/patched-odin-3-13-1.3762572/ and after you flash it and pop your VRZ sim it will get the VRZ UserData from off the sim. Just make sure to use the non home CFC file to wipe your phone clean
    1
    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.
    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