E556BXXS4CYL1 – Galaxy F55 5G firmware
Build E556BXXS4CYL1 is a security update for the Galaxy F55 5G (SM-E556B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jan 5, 2026 (method) and has reached
1 region so far. It keeps bootloader bit 4, so downgrading to the previous build E556BXXU4CYJ4 is still possible. Samsung still serves this file.
- Model
- SM-E556B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 4
- First released
- Jan 5, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received E556BXXS4CYL1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
INS | India | Jan 5, 2026 | day 0 | E556BXXS4CYL1/E556BODM4CYL1/E556BXXS4CYL1 |
Download and release notes
samloader download -m SM-E556B -r INS -v E556BXXS4CYL1/E556BODM4CYL1/E556BXXS4CYL1Samsung's release notes and security patch level for this update: SM-E556B / INS on doc.samsungmobile.com. What each part of the build number means: decode E556BXXS4CYL1.