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

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clayton006

Member
Apr 6, 2008
11
0
If it still reads VZWx3 even after flashing U1, then it's not going to be possible to get AT&T bloatware because you need at least one of them to read ATT. You would need a U1 model sold directly by Samsung in order to be able to do that, because that one WILL change the CSCs when you insert a SIM
Thanks anyway. At least this way my mobile hotspot and LTE mobile calls are working now with using the U firmware. Thanks for the write up and help.
 

Zheigg

New member
Sep 5, 2021
4
0
Hey All,

Need some help here...trying to flash my T-Mobile Fold 3 with the U1 firmware, but I'm getting the following errors:

1630809508930.png


Any ideas?

Using:

Odin 3.14.4
OS Windows 11 Pro
Frija - It downloaded this:

1630809608875.png
 

iBowToAndroid

Senior Member
Nov 9, 2010
4,898
1
1,560
Twin Cities MN
That's not the definition of a "dead link".

I haven't uploaded any U1 firmware. Anyone can get it themselves via the various firmware download tools like SamFirm and Frija. So therefore there's no reason for me to download it, just to upload it again (and AFH works like crap half of the time anyway)
 

mm60

Member
Nov 27, 2011
5
3
Have been trying to download the Verizon U firmware. First post says "Verizon (available via firmware download tools, but Manual Entry is required - Auto will not work)". Any idea if it is available. I just inserted my VZW sim into the phone and am waiting to boot. Will see if I can get the codes required to do the manual download. Thanks!
 

iBowToAndroid

Senior Member
Nov 9, 2010
4,898
1
1,560
Twin Cities MN
Have been trying to download the Verizon U firmware. First post says "Verizon (available via firmware download tools, but Manual Entry is required - Auto will not work)". Any idea if it is available. I just inserted my VZW sim into the phone and am waiting to boot. Will see if I can get the codes required to do the manual download. Thanks!
Verizon MVNOs like Xfinity and Spectrum always get the same versions that VZW does - and you *can* pull firmware (via Auto) for those carriers in the various firmware tools like SamFirm and Frija. So you can use one of their CSCs/Regions to pull the firmware, and then copy/paste the versions into each respective field for Manual Entry, for VZW
 
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jones4765

Member
Oct 30, 2007
7
0
San Diego
Have been trying to download the Verizon U firmware. First post says "Verizon (available via firmware download tools, but Manual Entry is required - Auto will not work)". Any idea if it is available. I just inserted my VZW sim into the phone and am waiting to boot. Will see if I can get the codes required to do the manual download. Thanks!
I have the unlocked fold and was able to get Verizon. It was a $3 charge to download, but did work and included the userdata file. https://samfirm.shop/samsung/firmware/445854
 

mm60

Member
Nov 27, 2011
5
3
Verizon MVNOs like Xfinity and Spectrum always get the same versions that VZW does - and you *can* pull firmware (via Auto) for those carriers in the various firmware tools like SamFirm and Frija. So you can use one of their CSCs/Regions to pull the firmware, and then copy/paste the versions into each respective field for Manual Entry, for VZW
Thank you! Tried this yesterday and it worked like a charm! Used both the Verizon MVNOs (Xfinity and Spectrum) to look for the firmware on automated mode and was able to identify the 3 codes (PSC/CSA/PDA) required for manual download. Compared the values and they were the same (as a double check). I then looked for the Verizon firmware using Frija manual mode and the 3 codes from the MVNO's and found it. Downloaded using Frija. which unpacked the compressed file. I then inserted my Verizon SIM into the new phone, booted up with the original U1 (unlocked) software, it prompted me that it would restart to update the setting for my provider, did a quick setup and shut the phone down. Restarted in download mode and used the modified Odin to load the Verizon U software including user data for the Verizon bloat. After the firmware loaded, the phone did not boot up but gave me the option to clear the user settings. I did so and booted into the Verizon U firmware. Was able to copy over all data using Smart Switch and the phone is working perfectly. Thanks for the guidance!
 

iBowToAndroid

Senior Member
Nov 9, 2010
4,898
1
1,560
Twin Cities MN
I have the unlocked fold and was able to get Verizon. It was a $3 charge to download, but did work and included the userdata file. https://samfirm.shop/samsung/firmware/445854
When I say "SamFirm", I'm not referring to a paid website. Anyone can get the firmware themselves for free, via the various firmware download tools (I'm talking about a computer program, not a website). But hey, at least you got it :)
Thank you! Tried this yesterday and it worked like a charm! Used both the Verizon MVNOs (Xfinity and Spectrum) to look for the firmware on automated mode and was able to identify the 3 codes (PSC/CSA/PDA) required for manual download. Compared the values and they were the same (as a double check). I then looked for the Verizon firmware using Frija manual mode and the 3 codes from the MVNO's and found it. Downloaded using Frija. which unpacked the compressed file. I then inserted my Verizon SIM into the new phone, booted up with the original U1 (unlocked) software, it prompted me that it would restart to update the setting for my provider, did a quick setup and shut the phone down. Restarted in download mode and used the modified Odin to load the Verizon U software including user data for the Verizon bloat. After the firmware loaded, the phone did not boot up but gave me the option to clear the user settings. I did so and booted into the Verizon U firmware. Was able to copy over all data using Smart Switch and the phone is working perfectly. Thanks for the guidance!
You're welcome
 

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  • 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