Samsung Galaxy S21 FE 5G (SM-G990B2) Firmware Overview
What is the latest SM-G990B2 firmware?
G990B2XXSKIZH2, released September 14, 2026 with Android 16. It is a security update on bootloader binary 20. 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 Galaxy S21 FE 5G still getting updates?
Yes. The newest build is from September 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-G990B2 firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. All decodable builds in the archive share binary 20:
- Binary 20 — since Aug 2026
All SM-G990B2 firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
G990B2XXSKIZH2
Security update
|
20 | INS | 16 |
2026-09-14 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | TUR | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | EUY | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | SKZ | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | SER | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | SEK | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | XEC | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | VOD | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | VIP | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | VGR | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | VDI | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | VDF | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | H3G | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | BOG | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | TMZ | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | MBM | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | AMO | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | FTM | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | OPV | 16 |
2026-08-25 | Download |
|
G990B2XXSKIZH2
Security update
|
20 | PRT | 16 |
2026-08-25 | Download |
Latest SM-G990B2 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 |
|---|---|---|---|---|
| AMO | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| BOG | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| EUY | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| FTM | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| H3G | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| INS | G990B2XXSKIZH2 | 20 | 16 | 2026-09-14 |
| MBM | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| OPV | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| PRT | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| SEK | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| SER | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| SKZ | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| TMZ | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| TUR | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| VDF | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| VDI | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| VGR | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| VIP | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| VOD | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
| XEC | G990B2XXSKIZH2 | 20 | 16 | 2026-08-25 |
How to Flash SM-G990B2 Firmware
Put the Samsung Galaxy S21 FE 5G 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 20 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.