E166PXXS4CZA1 – Galaxy F16 5G firmware
Build E166PXXS4CZA1 is a security update for the Galaxy F16 5G (SM-E166P)
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 3 to 4: once installed, the device no longer accepts firmware with bit 3 or lower, so a downgrade to E166PXXS3CYJ1 is blocked. Samsung still serves this file.
- Model
- SM-E166P
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 4
- First released
- Jan 29, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received E166PXXS4CZA1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
INS | India | Jan 29, 2026 | day 0 | E166PXXS4CZA1/E166PODM4CZA1/E166PXXS4CZA1 |
Download and release notes
samloader download -m SM-E166P -r INS -v E166PXXS4CZA1/E166PODM4CZA1/E166PXXS4CZA1Samsung's release notes and security patch level for this update: SM-E166P / INS on doc.samsungmobile.com. What each part of the build number means: decode E166PXXS4CZA1.