Known issues with Android OS built by Emteria on Raspberry Pi 4B (RPi4)

Does not boot / low performance on 1 GB / 2 GB versions. You will need at least 4 GB version for Android itself.
Some performance and animation issues (v14.1.0)
No camera support (v14.1.0)
No progress image during update with RPi4 touchscreen (v11.x.x)
- Touchscreen uses no default pixel format, which recovery does not support
- Display stays black, but update is performed and device reboots automatically
No support for GSM/WiFi modules, neither USB nor GPIO
Missing apps and features:
- TWRP (not planned)
Hardware:
- Support for only one simultaneous Bluetooth connection
- Spedal MF920Pro USB Webcam
- Waveshare SKU: 16103, 5″5 touchscreen [forum discussion]
Display shuts down although "Keep awake" is enabled if you have "Extended brightness range" enabled, but your display does not support extended brightness
- Disable "Extended brightness range"
Interferences of 2.4 GHz WiFi, USB3, and certain HDMI resolutions [forum discussion]

No BLE support (fixed in v13.5.0)
No HDMI audio output (fixed in v13.4.0)
Rarely, WiFi connection cannot be established (fixed in v13.3.0)
- Due to a race condition WiFi drivers sometimes cannot be loaded
- Workaround is to reboot the device
Ethernet settings cannot be changed (fixed in v13.3.0)
No ssh/sftp functionality (fixed in v13.3.0)
Android Notification (fixed in v13.1.26)
“Serial console enabled
Performance is impacted. To disable, check bootloader”
- You can get rid of it by disabling developer messages
Home screen flickers for 10 seconds after wake-up
Brightness/contrast is high with official RPi Touchscreen (fixed in v11.8.0)
Newer versions of the official touchscreen do not register touch events (fixed in v11.6.20)
- There seems to be a newer controller revision with "generic ft5x06 (00)"

VNC image is distorted after screen rotation (fixed in v11.5.4)
- Workaround: only start VNC server after rotating the screen
CSI cameras do not work in combination with a DSI display (fixed in v11.4.23)
Display flickers on transitions (fixed in v11.4.23)
Screen Rotation issues (fixed in v11.4.6)
- Rotation is not persistent after reboot
  - Workaround:
    - Connect via adb to the device shell and use following commands:
    - settings put system accelometer_rotation 1
    - settings put system user_rotation X (where X is 0-3, whichever rotation you need)
- 90°/270° rotation switches on screen rotation lock
Problems with Bluetooth LE (fixed in v11.3.16)