G955FXXUCDZEI – Galaxy S8+ firmware
Build G955FXXUCDZEI is a feature update for the Galaxy S8+ (SM-G955F)
on Android 9. It first appeared on Samsung's servers on Jun 25, 2026 (method) and has reached
1 region so far. It keeps bootloader bit 12, so downgrading to the previous build G955FXXUCDZED is still possible. Samsung still serves this file.
- Model
- SM-G955F
- Android
- Android 9
- Type
- Feature
- Bootloader bit
- 12
- First released
- Jun 25, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received G955FXXUCDZEI, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
BVO | Bolivia | Jun 25, 2026 | day 0 | G955FXXUCDZEI/G955FUWBCDZE3/G955FXXUCDUE1 |
Download and release notes
samloader download -m SM-G955F -r BVO -v G955FXXUCDZEI/G955FUWBCDZE3/G955FXXUCDUE1Samsung's release notes and security patch level for this update: SM-G955F / BVO on doc.samsungmobile.com. What each part of the build number means: decode G955FXXUCDZEI.