Samsung Galaxy Z Fold7 (SM-F966U) Firmware Overview
What is the latest SM-F966U firmware?
F966USQUDCZJB, released October 20, 2026 with Android 17. It is a feature update on bootloader binary 13. The archive holds 27 official builds across 9 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy Z Fold7 still getting updates?
Yes. The newest build is from October 2026, and 6 of 9 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-F966U builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: F966USQUCCZIH (Sep 2026), 16 builds in total
- Android 16: F966USQSBBZG3 (Jul 2026), 11 builds in total
Can I downgrade the SM-F966U firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 11 to 13:
- Binary 13 — since Oct 2026
- Binary 12 — since Aug 2026
- Binary 11 — since Jul 2026
A phone already on binary 13 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 13 build. How to read a build number.
All SM-F966U firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
F966USQUDCZJB
Feature update
|
13 | ATT | 17 |
2026-10-20 | Download |
|
F966USQSDCZJ1
Security update
|
13 | XAA | 17 |
2026-10-08 | Download |
|
F966USQSDCZJ1
Security update
|
13 | VZW | 17 |
2026-10-08 | Download |
|
F966USQSDCZJ1
Security update
|
13 | CCT | 17 |
2026-10-08 | Download |
|
F966USQSDCZJ1
Security update
|
13 | ATT | 17 |
2026-10-08 | Download |
|
F966USQSDCZJ1
Security update
|
13 | CHA | 17 |
2026-10-08 | Download |
|
F966USQSDCZJ1
Security update
|
13 | SPT | 17 |
2026-10-08 | Download |
|
F966USQUCCZIH
Feature update
|
12 | XAA | 17 |
2026-09-21 | Download |
|
F966USQUCCZIH
Feature update
|
12 | CHA | 17 |
2026-09-20 | Download |
|
F966USQUCCZIH
Feature update
|
12 | TMK | 17 |
2026-09-20 | Download |
|
F966USQUCCZIH
Feature update
|
12 | USC | 17 |
2026-09-20 | Download |
|
F966USQUCCZIH
Feature update
|
12 | TMB | 17 |
2026-09-20 | Download |
|
F966USQUCCZIH
Feature update
|
12 | CCT | 17 |
2026-09-20 | Download |
|
F966USQUCCZIH
Feature update
|
12 | ATT | 17 |
2026-09-20 | Download |
|
F966USQUCCZIH
Feature update
|
12 | VZW | 17 |
2026-09-20 | Download |
|
F966USQUCCZIH
Feature update
|
12 | SPT | 17 |
2026-09-20 | Download |
|
F966USQSCBZH3
Security update
|
12 | XAA | 16 |
2026-08-12 | Download |
|
F966USQSCBZH3
Security update
|
12 | SPT | 16 |
2026-08-12 | Download |
|
F966USQSCBZH3
Security update
|
12 | CCT | 16 |
2026-08-12 | Download |
|
F966USQSCBZH3
Security update
|
12 | ATT | 16 |
2026-08-12 | Download |
|
F966USQSCBZH3
Security update
|
12 | CHA | 16 |
2026-08-12 | Download |
|
F966USQSCBZH3
Security update
|
12 | VZW | 16 |
2026-08-12 | Download |
|
F966USQSCBZH3
Security update
|
12 | TMB | 16 |
2026-08-11 | Download |
|
F966USQSCBZH3
Security update
|
12 | USC | 16 |
2026-08-11 | Download |
|
F966USQSCBZH3
Security update
|
12 | TMK | 16 |
2026-08-11 | Download |
|
F966USQSBBZG3
Security update
|
11 | TMK | 16 |
2026-07-03 | Download |
|
F966USQSBBZG3
Security update
|
11 | CHA | 16 |
2026-07-03 | Download |
Latest SM-F966U Firmware by Region
The newest build for each region (CSC) code. Not sure which region your phone uses? See the CSC code guide.
| Region | Latest build | Bit | Android | Date |
|---|---|---|---|---|
| ATT | F966USQUDCZJB | 13 | 17 | 2026-10-20 |
| CCT | F966USQSDCZJ1 | 13 | 17 | 2026-10-08 |
| CHA | F966USQSDCZJ1 | 13 | 17 | 2026-10-08 |
| SPT | F966USQSDCZJ1 | 13 | 17 | 2026-10-08 |
| TMB | F966USQUCCZIH | 12 | 17 | 2026-09-20 |
| TMK | F966USQUCCZIH | 12 | 17 | 2026-09-20 |
| USC | F966USQUCCZIH | 12 | 17 | 2026-09-20 |
| VZW | F966USQSDCZJ1 | 13 | 17 | 2026-10-08 |
| XAA | F966USQSDCZJ1 | 13 | 17 | 2026-10-08 |
How to Flash SM-F966U Firmware
Put the Samsung Galaxy Z Fold7 into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 13 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.