J400GDXU9CUJ2 – Galaxy J4 firmware
Build J400GDXU9CUJ2 is a feature update for the Galaxy J4 (SM-J400G)
on Android 10. It first appeared on Samsung's servers on Jan 16, 2022 (method) and has reached
4 regions so far. It raises the bootloader bit from 8 to 9: once installed, the device no longer accepts firmware with bit 8 or lower, so a downgrade to J400GDXU8CUF3 is blocked. Samsung still serves this file.
- Model
- SM-J400G
- Android
- Android 10
- Type
- Feature
- Bootloader bit
- 9
- First released
- Jan 16, 2022
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received J400GDXU9CUJ2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
BRI | Taiwan | Jan 16, 2022 | day 0 | J400GDXU9CUJ2/J400GOLO9CUJ2/J400GDXU9CUJ1 |
GLB | Philippines (Globe) | Jan 16, 2022 | day 0 | J400GDXU9CUJ2/J400GOLO9CUJ2/J400GDXU9CUJ1 |
SMA | Philippines | Jan 16, 2022 | day 0 | J400GDXU9CUJ2/J400GOLO9CUJ2/J400GDXU9CUJ1 |
XTC | Philippines | Jan 16, 2022 | day 0 | J400GDXU9CUJ2/J400GOLO9CUJ2/J400GDXU9CUJ1 |
Download and release notes
samloader download -m SM-J400G -r BRI -v J400GDXU9CUJ2/J400GOLO9CUJ2/J400GDXU9CUJ1Samsung's release notes and security patch level for this update: SM-J400G / BRI on doc.samsungmobile.com. What each part of the build number means: decode J400GDXU9CUJ2.