Galaxy A55 5G SM-A556B firmware
The latest stable build is A556BXXUIEZJ1 (Android 17, feature update), first released on Oct 25, 2026 – 12 days ago. Samsung has published 36 stable builds for this model since Mar 10, 2024: 26 security and 10 feature updates, from Android 14 to Android 17. The current bootloader (binary) version is 18. A device on bit 18 only accepts firmware with bit 18 or higher – see downgrading and the bootloader bit.
- Latest build
A556BXXUIEZJ1- Released
- Oct 25, 2026
- Android
- Android 17
- Bootloader bit
- 18
- Regions
- 16
- Stable builds
- 36
Latest firmware by region (CSC)
Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.
| CSC | Region | Latest build | Android | Released | Builds |
|---|---|---|---|---|---|
BOG | France (Bouygues) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
EUX | Europe (Multi-CSC) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
EUY | Europe (Multi-CSC) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
EVR | United Kingdom (EE) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
MEO | Portugal (MEO) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
MOB | Austria (A1) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
MOT | Slovenia (Telekom) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
MSR | Serbia | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
O2C | Czech Republic (O2) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
PLS | Poland (Plus) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
PRT | Poland (Play) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
SFR | France (SFR) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
SIM | Slovenia (A1) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
SWC | Switzerland | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
TOP | Serbia/Montenegro | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
VIP | Croatia (A1) | A556BXXUIEZJ1 | Android 17 | Oct 25, 2026 | 36 |
Firmware history (36 builds)
Every stable build (PDA version) Samsung has published for the SM-A556B, newest first. “” is the earliest date the build appeared on Samsung's servers in any region. “” means Samsung no longer serves the file for that build.
| Build (PDA) | Released | Android | Type | Bit | Regions | File |
|---|---|---|---|---|---|---|
A556BXXUIEZJ1 | Oct 25, 2026 | Android 17 | Feature | 18 | 16 | on server |
A556BXXSIDZI3 | Sep 20, 2026 | Android 16 | Security | 18 | 16 | on server |
A556BXXSHDZH6 | Sep 2, 2026 | Android 16 | Security | 17 | 16 | on server |
A556BXXSGDZG2 | Jul 19, 2026 | Android 16 | Security | 16 | 16 | on server |
A556BXXSFDZF4 | Jun 28, 2026 | Android 16 | Security | 15 | 16 | on server |
A556BXXUEDZE4 | May 31, 2026 | Android 16 | Feature | 14 | 16 | on server |
A556BXXSECZDE | May 13, 2026 | Android 16 | Security | 14 | 16 | on server |
A556BXXSECZD1 | Apr 20, 2026 | Android 16 | Security | 14 | 16 | on server |
A556BXXSDCZC4 | Mar 30, 2026 | Android 16 | Security | 13 | 16 | on server |
A556BXXSDCZB5 | Mar 1, 2026 | Android 16 | Security | 13 | 16 | on server |
A556BXXSCCZA1 | Jan 13, 2026 | Android 16 | Security | 12 | 16 | on server |
A556BXXSBCYL1 | Dec 15, 2025 | Android 16 | Security | 11 | 16 | on server |
A556BXXSBCYK2 | Nov 23, 2025 | Android 16 | Security | 11 | 16 | on server |
A556BXXSACYJ2 | Oct 30, 2025 | Android 16 | Security | 10 | 16 | on server |
A556BXXUACYI9 | Oct 6, 2025 | Android 16 | Feature | 10 | 16 | on server |
A556BXXSABYI1 | Sep 28, 2025 | Android 15 | Security | 10 | 16 | on server |
A556BXXSABYG2 | Aug 20, 2025 | Android 15 | Security | 10 | 16 | on server |
A556BXXS9BYF3 | Jul 21, 2025 | Android 15 | Security | 9 | 16 | on server |
A556BXXS8BYE1 | Jun 22, 2025 | Android 15 | Security | 8 | 16 | on server |
A556BXXU7BYDB | May 20, 2025 | Android 15 | Feature | 7 | 16 | on server |
A556BXXS7AYC6 | Apr 8, 2025 | Android 14 | Security | 7 | 16 | on server |
A556BXXS6AYB4 | Mar 9, 2025 | Android 14 | Security | 6 | 16 | on server |
A556BXXS6AYB2 | Feb 24, 2025 | Android 14 | Security | 6 | 16 | on server |
A556BXXS6AYA3 | Jan 29, 2025 | Android 14 | Security | 6 | 16 | on server |
A556BXXU6AXL2 | Dec 18, 2024 | Android 14 | Feature | 6 | 16 | on server |
A556BXXS5AXI4 | Oct 15, 2024 | Android 14 | Security | 5 | 16 | on server |
A556BXXS4AXH4 | Sep 9, 2024 | Android 14 | Security | 4 | 16 | on server |
A556BXXU4AXH1 | Aug 21, 2024 | Android 14 | Feature | 4 | 16 | on server |
A556BXXS4AXF3 | Jul 10, 2024 | Android 14 | Security | 4 | 16 | on server |
A556BXXS3AXF2 | Jun 28, 2024 | Android 14 | Security | 3 | 16 | on server |
A556BXXU3AXF1 | Jun 24, 2024 | Android 14 | Feature | 3 | 16 | on server |
A556BXXU3AXE1 | Jun 24, 2024 | Android 14 | Feature | 3 | 16 | on server |
A556BXXS2AXD3 | Apr 28, 2024 | Android 14 | Security | 2 | 16 | on server |
A556BXXU1AXC4 | Apr 23, 2024 | Android 14 | Feature | 1 | 16 | on server |
A556BXXS1AXC1 | Mar 25, 2024 | Android 14 | Security | 1 | 16 | on server |
A556BXXU1AXB7 | Mar 10, 2024 | Android 14 | Feature | 1 | 16 | on server |
How to download SM-A556B firmware
We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:
samloader download -m SM-A556B -r EUXReplace EUX with your region code. Step-by-step instructions, including a graphical alternative:
How to download Samsung firmware.
Changelog and security patch level
Samsung publishes the release notes for each update, including the security patch level, on its own site. They are listed per region – for example SM-A556B / EUX release notes on doc.samsungmobile.com. Each region page here links to the notes for that code.