Galaxy Z Fold7 SM-F966U1 updates & firmware
This page tracks every software update Samsung's update servers list for the Samsung Galaxy Z Fold7 (SM-F966U1). The latest stable build is F966U1UEUDCZJB (Android 17, feature update), first released on Nov 4, 2026. Samsung has published 19 stable builds for this model since Jul 9, 2025: 13 security and 6 feature updates, from Android 16 to Android 17. The current bootloader (binary) version is 13. A device on bit 13 only accepts firmware with bit 13 or higher – see downgrading and the bootloader bit.
Rollout: build F966U1UEUDCZJB (Android 17 (One UI 9)) is live in all 14 regions, first released on Nov 4, 2026 in TMB (USA (T-Mobile)).
- Latest build
F966U1UEUDCZJB- Released
- Nov 4, 2026
- Android
- Android 17
- Bootloader bit
- 13
- Regions
- 14
- Stable builds
- 19
Update policy
Samsung promised 7 major Android upgrades and 7 years of security updates for the Galaxy Z Fold7, counted from its launch in July 2025 with Android 16. That makes Android 23 the last major version and security updates continue until about July 2032. It is currently on Android 17 (One UI 9), so 6 major upgrades are still to come.
- OS upgrades promised
- 7
- Security updates
- 7 years
- Last major version
- Android 23
- Security support until
- July 2032
- Current version
- Android 17 (One UI 9)
- Status
- Supported
Source: reported by sammobile.com. Samsung counts from the global launch and does not publish exact end dates; the dates above are launch month plus the promised years.
Compare all models: Samsung update policy by model.
Latest firmware by region (CSC)
Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.
| CSC | Region | Latest build | Android | Released | Builds |
|---|---|---|---|---|---|
ACG | USA (C Spire) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
AIO | USA (Cricket) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
ATT | USA (AT&T) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
CCT | USA (Comcast) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
DSA | USA | F966U1UEUDCZJB | Android 17 | Nov 5, 2026 | 25 |
DSH | USA | F966U1UEUDCZJB | Android 17 | Nov 5, 2026 | 25 |
LRA | USA (Bluegrass) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
TFN | USA (TracFone) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
TMB | USA (T-Mobile) | F966U1UESDCZJ1 | Android 17 | Nov 5, 2026 | 25 |
TMK | USA (MetroPCS) | F966U1UESDCZJ1 | Android 17 | Nov 5, 2026 | 25 |
USC | USA (US Cellular) | F966U1UESDCZJ1 | Android 17 | Nov 5, 2026 | 25 |
VZW | USA (Verizon) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
XAA | USA (unlocked) | F966U1UESDCZJ1 | Android 17 | Nov 5, 2026 | 25 |
XAR | USA (Cellular South) | F966U1UEUDCZJB | Android 17 | Nov 4, 2026 | 25 |
Firmware history (19 builds)
Every stable build (PDA version) Samsung has published for the SM-F966U1, newest first. “Released” is the earliest date the build appeared on Samsung's servers in any region (how dates work). “pulled” means Samsung no longer serves the file for that build, usually because newer builds replaced it (details).
| Build (PDA) | Released | Android | Type | Bit | Regions | File |
|---|---|---|---|---|---|---|
F966U1UEUDCZJB | Nov 4, 2026 | Android 17 | Feature | 13 | 14 | on server |
F966U1UESDCZJ1 | Oct 21, 2026 | Android 17 | Security | 13 | 14 | on server |
F966U1UEUCCZIH | Oct 5, 2026 | Android 17 | Feature | 12 | 14 | on server |
F966U1UESCBZH3 | Aug 31, 2026 | Android 16 | Security | 12 | 14 | on server |
F966U1UESBBZG3 | Jul 14, 2026 | Android 16 | Security | 11 | 14 | on server |
F966U1UEUABZF1 | Jun 14, 2026 | Android 16 | Feature | 10 | 14 | on server |
F966U1UESABZE3 | May 25, 2026 | Android 16 | Security | 10 | 14 | on server |
F966U1UEU9BZDN | May 11, 2026 | Android 16 | Feature | 9 | 14 | on server |
F966U1UES9AZC8 | Apr 13, 2026 | Android 16 | Security | 9 | 14 | on server |
F966U1UES8AZC1 | Mar 22, 2026 | Android 16 | Security | 8 | 14 | on server |
F966U1UES8AZB6 | Feb 25, 2026 | Android 16 | Security | 8 | 14 | on server |
F966U1UES7AZA1 | Jan 18, 2026 | Android 16 | Security | 7 | 14 | on server |
F966U1UES6AYKF | Dec 10, 2025 | Android 16 | Security | 6 | 14 | on server |
F966U1UES6AYK9 | Nov 19, 2025 | Android 16 | Security | 6 | 14 | on server |
F966U1UES5AYJ3 | Oct 26, 2025 | Android 16 | Security | 5 | 14 | on server |
F966U1UEU4AYI1 | Sep 14, 2025 | Android 16 | Feature | 4 | 14 | on server |
F966U1UES3AYH1 | Aug 19, 2025 | Android 16 | Security | 3 | 14 | on server |
F966U1UES2AYGG | Jul 30, 2025 | Android 16 | Security | 2 | 14 | on server |
F966U1UEU1AYFJ | Jul 9, 2025 | Android 16 | Feature | 1 | 14 | on server |
Beta and test builds
Samsung's servers also list 6 beta build(s) for this model. They are not offered to regular users and are often removed after the next stable release.
| Build | Listed | File |
|---|---|---|
F966U1UEUCZZI6 | Sep 8, 2026 | pulled |
F966U1UEUCZZHP | Sep 3, 2026 | pulled |
F966U1UEU9ZZDD | Apr 20, 2026 | pulled |
F966U1UEU9ZZD3 | Apr 16, 2026 | pulled |
F966U1UEU8ZZCD | Mar 26, 2026 | pulled |
F966U1UEU8ZZC5 | Mar 11, 2026 | pulled |
How to download SM-F966U1 firmware
We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:
samloader download -m SM-F966U1 -r XAAReplace XAA with your region code. Step-by-step instructions, including a graphical alternative:
How to download Samsung firmware.
Changelog and security patch level
Samsung publishes the release notes for each update, including the security patch level, on its own site. They are listed per region – for example SM-F966U1 / XAA release notes on doc.samsungmobile.com. Each region page here links to the notes for that code. We don't show the patch level ourselves because Samsung's update servers don't report it (why).