Samsung SM-G991B Firmware Overview
What is the latest SM-G991B firmware?
G991BXXUJHZF2, released July 3, 2026 with Android 15. It is a feature update on bootloader binary 19. The archive holds 20 official builds across 20 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung SM-G991B still getting updates?
Yes. The newest build is from July 2026, and 1 of 20 regions already have a build from that month; the rest usually follow within a few weeks.
Can I downgrade the SM-G991B firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. All decodable builds in the archive share binary 19:
- Binary 19 — since Mar 2026
All SM-G991B firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
G991BXXUJHZF2
Feature update
|
19 | XID | 15 |
2026-07-03 | Download |
|
G991BXXSJHZC2
Security update
|
19 | CGU | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | CWW | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | UYO | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | UPO | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | UFU | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | TGP | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | TCE | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | PSP | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | PGU | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | CTU | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | CTP | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | CPA | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | CDR | 15 |
2026-03-27 | Download |
|
G991BXXSJHZC2
Security update
|
19 | NPL | 15 |
2026-03-26 | Download |
|
G991BXXSJHZC2
Security update
|
19 | INU | 15 |
2026-03-26 | Download |
|
G991BXXSJHZC2
Security update
|
19 | SLK | 15 |
2026-03-26 | Download |
|
G991BXXSJHZC2
Security update
|
19 | ARO | 15 |
2026-03-26 | Download |
|
G991BXXSJHZC2
Security update
|
19 | UFN | 15 |
2026-03-26 | Download |
|
G991BXXSJHZC2
Security update
|
19 | TMM | 15 |
2026-03-26 | Download |
Latest SM-G991B 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 |
|---|---|---|---|---|
| ARO | G991BXXSJHZC2 | 19 | 15 | 2026-03-26 |
| CDR | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| CGU | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| CPA | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| CTP | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| CTU | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| CWW | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| INU | G991BXXSJHZC2 | 19 | 15 | 2026-03-26 |
| NPL | G991BXXSJHZC2 | 19 | 15 | 2026-03-26 |
| PGU | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| PSP | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| SLK | G991BXXSJHZC2 | 19 | 15 | 2026-03-26 |
| TCE | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| TGP | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| TMM | G991BXXSJHZC2 | 19 | 15 | 2026-03-26 |
| UFN | G991BXXSJHZC2 | 19 | 15 | 2026-03-26 |
| UFU | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| UPO | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| UYO | G991BXXSJHZC2 | 19 | 15 | 2026-03-27 |
| XID | G991BXXUJHZF2 | 19 | 15 | 2026-07-03 |
How to Flash SM-G991B Firmware
Put the Samsung SM-G991B 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 19 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.