M055FXXS6CZA1 – Galaxy M05 firmware
Build M055FXXS6CZA1 is a security update for the Galaxy M05 (SM-M055F)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jan 29, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 5 to 6: once installed, the device no longer accepts firmware with bit 5 or lower, so a downgrade to M055FXXU5CYJ4 is blocked. Samsung still serves this file.
- Model
- SM-M055F
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 6
- First released
- Jan 29, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received M055FXXS6CZA1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
INS | India | Jan 29, 2026 | day 0 | M055FXXS6CZA1/M055FODM6CZA1/M055FXXS6CZA1 |
Download and release notes
samloader download -m SM-M055F -r INS -v M055FXXS6CZA1/M055FODM6CZA1/M055FXXS6CZA1Samsung's release notes and security patch level for this update: SM-M055F / INS on doc.samsungmobile.com. What each part of the build number means: decode M055FXXS6CZA1.