[Samsung Galaxy Z Flip 5G Guides, News, & Discussio] iBowToAndroid:
For those who don't know, F707U is the model number of all of the US carrier versions of the Galaxy Z Flip 5G. The F707U1 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. 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.

These are used for converting from one carrier's U firmware to AT&T's, or from U1 firmware back to U firmware with AT&T features and bloat. These are much tougher to find than other carriers' files due to AT&T's policy against public hosting of their firmware files - they can't be obtained from SamFirm or Frija or SamMobile. But I pay for a subscription to a site that gets AT&T files, and also sometimes gets other carriers' firmware files before they hit SamFirm/Frija, so that's where my files come from.

So I'll be uploading at least one USERDATA for each bootloader version, and I'll do the full firmware (for at least one build per bootloader level) if AT&T was the only carrier to get that specific build.

Since firmware is universal on U models, for a full flash you can use the other 4 Odin files (BL, AP, CP, CSC) from any other firmware of the same build. You can probably even mix and match builds (as long as the Android version is the same), if you can't find files for the exact same build. You can't mix and match bootloaders though, so the other 4 files have to at least be from the same bootloader level.

Happy flashing!

https://www.androidfilehost.com/?w=files&flid=318351

NOTES:

- I won't be providing detailed instructions on how to flash files in Odin. If you're not aware of how to do that, there are countless "beginner's guide to Odin flashing"-type threads here on XDA already

- I compress 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

- My naming method for AFH folders 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.

- If the phone doesn't do it automatically, the correct procedure for manually switching from one carrier's firmware to another is:

1. With no SIM inserted, flash the full U1 firmware package including non HOME CSC

2. Upon boot, insert a SIM of the carrier whose firmware you want

3. Watch for the popup that says "reboot to apply new carrier settings" etc, and do it

4. After that restart completes, reboot back to Download mode and flash the full U firmware package, with the USERDATA file of the carrier whose firmware you want

- USERDATAs for any other CSCs/regions can be gotten from SamFirm or Frija - for the latest version. If you need an old USERDATA for a CSC/region that's not commonly found, let me know and I can probably get it.

- For identifying USERDATAS, and to know what region/CSC to use in SamFirm/Frija:

AIO = Cricket (not available via SamFirm/Frija)

ATT = AT&T (not available via SamFirm/Frija)

BST = Boost Mobile

CCT = Xfinity Mobile (Comcast)

CHA = Spectrum Mobile (Charter)

SPR = Sprint

TMB = T-Mobile

TMK = Metro PCS

USC = US Cellular

VZW = Verizon (available via SamFirm/Frija, but Manual Entry is required - Auto will not work)

XAA = U1 firmware