E556BXXS5CZB4 – Galaxy F55 5G firmware
Build E556BXXS5CZB4 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 Mar 9, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 4 to 5: once installed, the device no longer accepts firmware with bit 4 or lower, so a downgrade to E556BXXS4CYL1 is blocked. Samsung still serves this file.
- Model
- SM-E556B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 5
- First released
- Mar 9, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received E556BXXS5CZB4, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
INS | India | Mar 9, 2026 | day 0 | E556BXXS5CZB4/E556BODM5CZB4/E556BXXS5CZB4 |
Download and release notes
samloader download -m SM-E556B -r INS -v E556BXXS5CZB4/E556BODM5CZB4/E556BXXS5CZB4Samsung'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 E556BXXS5CZB4.