Samsung SM-A405S Firmware Overview
What is the latest SM-A405S firmware?
A405SKSS5CWA2, released February 16, 2023 with Android 11. It is a security update on bootloader binary 5. The archive holds 20 official builds across 1 region (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung SM-A405S still getting updates?
Most likely not: there has been no new firmware since February 2023, so Android 11 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
Which Android versions did it get?
The SM-A405S builds in the archive run Android 9 to 11. The earliest build we have for each version:
- Android 11: A405SKSU3CUC8 (Apr 2021), 8 builds in total
- Android 10: A405SKSU2BTD1 (Apr 2020), 7 builds in total
- Android 9: A405SKSU1ASH4 (Aug 2019), 5 builds in total
Can I downgrade the SM-A405S 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 5:
- Binary 5 — since Nov 2021
- Binary 4 — since Aug 2021
- Binary 3 — since Oct 2020
- Binary 2 — since Jan 2020
- Binary 1 — since Aug 2019
A phone already on binary 5 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 5 build. How to read a build number.
All SM-A405S firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
A405SKSS5CWA2
Security update
|
5 | SKC | 11 |
2023-02-16 | Download |
|
A405SKSU5CVK1
Feature update
|
5 | SKC | 11 |
2022-11-30 | Download |
|
A405SKSU5CVH1
Feature update
|
5 | SKC | 11 |
2022-08-29 | Download |
|
A405SKSU5CVE2
Feature update
|
5 | SKC | 11 |
2022-05-30 | Download |
|
A405SKSU5CVB1
Feature update
|
5 | SKC | 11 |
2022-03-07 | Download |
|
A405SKSU5CUK3
Feature update
|
5 | SKC | 11 |
2021-12-02 | Download |
|
A405SKSU4CUH5
Feature update
|
4 | SKC | 11 |
2021-09-09 | Download |
|
A405SKSU3CUC8
Feature update
|
3 | SKC | 11 |
2021-04-12 | Download |
|
A405SKSU3BTJ2
Feature update
|
3 | SKC | 10 |
2020-10-26 | Download |
|
A405SKSU2BTF1
Feature update
|
2 | SKC | 10 |
2020-06-10 | Download |
|
A405SKSU2BTF1
Feature update
|
2 | SKC | 10 |
2020-06-03 | Download |
|
A405SKSU2BTD2
Feature update
|
2 | SKC | 10 |
2020-04-24 | Download |
|
A405SKSU2BTD2
Feature update
|
2 | SKC | 10 |
2020-04-24 | Download |
|
A405SKSU2BTD1
Feature update
|
2 | SKC | 10 |
2020-04-02 | Download |
|
A405SKSU2BTD1
Feature update
|
2 | SKC | 10 |
2020-04-01 | Download |
|
A405SKSU2ATA1
Feature update
|
2 | SKC | 9 |
2020-01-09 | Download |
|
A405SKSU2ATA1
Feature update
|
2 | SKC | 9 |
2020-01-07 | Download |
|
A405SKSU1ASJ2
Feature update
|
1 | SKC | 9 |
2019-10-15 | Download |
|
A405SKSU1ASJ2
Feature update
|
1 | SKC | 9 |
2019-10-11 | Download |
|
A405SKSU1ASH4
Feature update
|
1 | SKC | 9 |
2019-08-20 | Download |
How to Flash SM-A405S Firmware
Put the Samsung SM-A405S 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 5 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.