Samsung Galaxy S8+ (SM-G9550) Firmware Overview
What is the latest SM-G9550 firmware?
G9550ZCS6DUD1, released April 27, 2021 with Android 9. It is a security update on bootloader binary 6. The archive holds 20 official builds across 2 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy S8+ still getting updates?
Most likely not: there has been no new firmware since April 2021, so Android 9 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
Can I downgrade the SM-G9550 firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 1 to 6:
- Binary 6 — since Jul 2020
- Binary 5 — since Jan 2020
- Binary 3 — since Jul 2018
- Binary 2 — since Nov 2017
- Binary 1 — since Jul 2017
A phone already on binary 6 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 6 build. How to read a build number.
All SM-G9550 firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
G9550ZCS6DUD1
Security update
|
6 | CHC | 9 |
2021-04-27 | Download |
|
G9550ZHS6DUD1
Security update
|
6 | TGY | 9 |
2021-04-27 | Download |
|
G9550ZCU6DUC1
Feature update
|
6 | CHC | 9 |
2021-04-07 | Download |
|
G9550ZCU6DTL2
Feature update
|
6 | CHC | 9 |
2021-01-05 | Download |
|
G9550ZHU6DTL1
Feature update
|
6 | TGY | 9 |
2021-01-05 | Download |
|
G9550ZHU6DTJ1
Feature update
|
6 | TGY | 9 |
2020-11-06 | Download |
|
G9550ZCS6DTJ1
Security update
|
6 | CHC | 9 |
2020-10-30 | Download |
|
G9550ZHU6DTG2
Feature update
|
6 | TGY | 9 |
2020-10-13 | Download |
|
G9550ZCU6DTG2
Feature update
|
6 | CHC | 9 |
2020-10-13 | Download |
|
G9550ZCU6DTG2
Feature update
|
6 | CHC | 9 |
2020-07-23 | Download |
|
G9550ZHU6DTG2
Feature update
|
6 | TGY | 9 |
2020-07-23 | Download |
|
G9550ZCU6DTG2
Feature update
|
6 | CHC | 9 |
2020-07-22 | Download |
|
G9550ZHU5DTF4
Feature update
|
5 | TGY | 9 |
2020-06-22 | Download |
|
G9550ZCU5DTF3
Feature update
|
5 | CHC | 9 |
2020-06-13 | Download |
|
G9550ZCU5DTF3
Feature update
|
5 | CHC | 9 |
2020-06-11 | Download |
|
G9550ZHS5DTC1
Security update
|
5 | TGY | 9 |
2020-03-09 | Download |
|
G9550ZCS5DTC1
Security update
|
5 | CHC | 9 |
2020-03-09 | Download |
|
G9550ZHU5DTB1
Feature update
|
5 | TGY | 9 |
2020-02-13 | Download |
|
G9550ZCU5DTB1
Feature update
|
5 | CHC | 9 |
2020-02-12 | Download |
|
G9550ZHU5DTA1
Feature update
|
5 | TGY | 9 |
2020-01-14 | Download |
Latest SM-G9550 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 |
|---|---|---|---|---|
| CHC | G9550ZCS6DUD1 | 6 | 9 | 2021-04-27 |
| TGY | G9550ZHS6DUD1 | 6 | 9 | 2021-04-27 |
Older SM-G9550 Builds (Archive)
25 earlier builds from the samdb.org catalogue. They are not in the download list above; the link searches for the build on the partner site.
| Build / PDA | Bit | Month | Regions (CSC) | |
|---|---|---|---|---|
| G9550ZHU3CRK2 | 3 | Nov 2018 | TGY | Find |
| G9550ZCU3CRK2 | 3 | Nov 2018 | CHC | Find |
| G9550ZHU3CRJ1 | 3 | Oct 2018 | TGY | Find |
| G9550ZCU3CRJ1 | 3 | Oct 2018 | CHC | Find |
| G9550ZHU3CRI3 | 3 | Sep 2018 | TGY | Find |
| G9550ZCU3CRI2 | 3 | Sep 2018 | CHC | Find |
| G9550ZCU3CRH1 | 3 | Aug 2018 | CHC | Find |
| G9550ZHU3CRG5 | 3 | Jul 2018 | TGY | Find |
| G9550ZHU2CRF2 | 2 | Jun 2018 | TGY | Find |
| G9550ZCU2CRF2 | 2 | Jun 2018 | CHC | Find |
| G9550ZHU2CRE1 | 2 | May 2018 | TGY | Find |
| G9550ZHS2CRE2 | 2 | May 2018 | TGY | Find |
| G9550ZCU2CRE1 | 2 | May 2018 | CHC | Find |
| G9550ZHU2CRD4 | 2 | Apr 2018 | TGY | Find |
| G9550ZCU2CRD8 | 2 | Apr 2018 | CHC | Find |
| G9550ZCU2CRD4 | 2 | Apr 2018 | CHC | Find |
| G9550ZCU2ARB3 | 2 | Feb 2018 | CHC | Find |
| G9550ZHU2AQL2 | 2 | Dec 2017 | TGY | Find |
| G9550ZCU2AQL2 | 2 | Dec 2017 | CHC | Find |
| G9550ZCU2AQK8 | 2 | Nov 2017 | CHC | Find |
| G9550ZHU1AQJ8 | 1 | Oct 2017 | TGY | Find |
| G9550ZCU1AQJ8 | 1 | Oct 2017 | CHC | Find |
| G9550ZCU1AQJ4 | 1 | Oct 2017 | CHC | Find |
| G9550ZCU1AQI5 | 1 | Sep 2017 | CHC | Find |
| G9550ZHU1AQG6 | 1 | Jul 2017 | TGY | Find |
How to Flash SM-G9550 Firmware
Put the Samsung Galaxy S8+ 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 6 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.