A405SKSU5CUK3 – Galaxy A40 firmware
Build A405SKSU5CUK3 is a feature update for the Galaxy A40 (SM-A405S)
on Android 11 (One UI 3). It first appeared on Samsung's servers on Dec 2, 2021 (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 A405SKSU4CUH5 is blocked. Samsung has pulled this build: the file is no longer served (what this means).
- Model
- SM-A405S
- Android
- Android 11
- Type
- Feature
- Bootloader bit
- 5
- First released
- Dec 2, 2021
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received A405SKSU5CUK3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
SKC | South Korea (SKT) | Dec 2, 2021 | day 0 | A405SKSU5CUK3/A405SSKC5CUK3/A405SKSU5CUK1 |
Download and release notes
samloader download -m SM-A405S -r SKC -v A405SKSU5CUK3/A405SSKC5CUK3/A405SKSU5CUK1Samsung's release notes and security patch level for this update: SM-A405S / SKC on doc.samsungmobile.com. What each part of the build number means: decode A405SKSU5CUK3.