Samsung Galaxy M55s 5G (SM-M558B) Firmware Overview
What is the latest SM-M558B firmware?
M558BXXS3DZH1, released August 17, 2026 with Android 16. It is a security update on bootloader binary 3. The archive holds 10 official builds across 1 region (CSC).
Is the Samsung Galaxy M55s 5G still getting updates?
Yes. The newest build is from August 2026.
Which Android versions did it get?
The SM-M558B builds in the archive run Android 14 to 16. The earliest build we have for each version:
- Android 16: M558BXXU2CYJ4 (Oct 2025), 6 builds in total
- Android 15: M558BXXU2BYE7 (May 2025), 2 builds in total
- Android 14: M558BXXS2AXL1 (Jan 2025), 2 builds in total
Can I downgrade the SM-M558B firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 2 to 3:
- Binary 3 — since Feb 2026
- Binary 2 — since Dec 2024
A phone already on binary 3 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 3 build. How to read a build number.
All SM-M558B firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
M558BXXS3DZH1
Security update
|
3 | INS | 16 |
2026-08-17 | Download |
|
M558BXXS3DZF2
Security update
|
3 | INS | 16 |
2026-06-15 | Download |
|
M558BXXU3DZE3
Feature update
|
3 | INS | 16 |
2026-05-13 | Download |
|
M558BXXS3CZB4
Security update
|
3 | INS | 16 |
2026-03-10 | Download |
|
M558BXXS2CYL1
Security update
|
2 | INS | 16 |
2025-12-30 | Download |
|
M558BXXU2CYJ4
Feature update
|
2 | INS | 16 |
2025-10-27 | Download |
|
M558BXXS2BYH2
Security update
|
2 | INS | 15 |
2025-08-21 | Download |
|
M558BXXU2BYE7
Feature update
|
2 | INS | 15 |
2025-05-29 | Download |
|
M558BXXU2AYB3
Feature update
|
2 | INS | 14 |
2025-03-04 | Download |
|
M558BXXS2AXL1
Security update
|
2 | INS | 14 |
2025-01-10 | Download |
How to Flash SM-M558B Firmware
Put the Samsung Galaxy M55s 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 3 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.