Samsung Galaxy J4 (samsung-j4lte)
 Samsung Galaxy J4, on postmarketOS boot splash screen | |
| Manufacturer | Samsung |
|---|---|
| Name | Galaxy J4 |
| Codename | samsung-j4lte |
| Model | SM-J400 |
| Released | 2018 |
| Type | handset |
| Hardware | |
| Chipset | Samsung Exynos 7570 Quad |
| CPU | 4x 1.4 GHz ARM Cortex A53 |
| GPU | Mali T720 |
| Display | 720x1280 IPS |
| Storage | 32 GB |
| Memory | 2 GB |
| Architecture | aarch64 |
| Software | |
| Original software | Android |
| Original version | 10 |
| postmarketOS | |
| Category | testing |
| Pre-built images | no |
| postmarketOS kernel | 3.18.140 |
| Flashing |
Partial |
|---|---|
| USB Networking |
Works |
| Internal storage |
Works |
| SD card | |
| Battery |
Works |
| Screen |
Works |
| Touchscreen |
Works |
| Multimedia | |
| 3D Acceleration | |
| Audio |
Broken |
| Camera |
Broken |
| Camera Flash | |
| Connectivity | |
| WiFi |
Works |
| Bluetooth | |
| Ethernet | |
| GPS | |
| Modem | |
| Calls | |
| SMS | |
| Mobile data | |
| Miscellaneous | |
| FDE | |
| USB OTG | |
| Sensors | |
| Accelerometer | |
| Magnetometer | |
| Proximity | |
| Hall Effect | |
| Haptics | |
| Barometer | |
| Power Sensor | |
Contributors
- manoedinata
Users owning this device
- Manoedinata (Notes: Trying to port postmarketOS.)
How to enter flash mode
Power + Volume Down + Home
In some cases, using power button to boot into Download Mode doesn't work. Instead, while pressing Volume Down + Home, connect the device to PC via USB. Don't release the buttons until you're in the Download Mode.
Installation
Use pmbootstrap to build your own installation image.
The nonfree-firmware adds the required binaries for Wi-Fi. This should be installed by default.