CMCC A1 / M623C (wingtech-wt86621)

Features
Flashing Whether it is possible to flash the device with pmbootstrap flasher.	Works
USB Networking After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).	Works
Internal storage eMMC, SD cards, UFS...	Works
SD card Also includes other external storage cards.	Works
Battery Whether charging and battery level reporting work.	Works
Screen Whether the display works; ideally with sleep mode and brightness control.	Works
Touchscreen	Works
Multimedia
3D Acceleration	Works
Audio Audio playback, microphone, headset and buttons.	Works
Camera	Broken
Camera Flash	Works
Connectivity
WiFi	Works
Bluetooth	Works
Ethernet	Untested
GPS	Untested
Modem
Calls	Untested
SMS	Untested
Mobile data	Untested
Miscellaneous
FDE Full disk encryption and unlocking with unl0kr.	Untested
USB OTG USB On-The-Go or USB-C Role switching.	Untested
Sensors
Accelerometer Handles automatic screen rotation in many interfaces.	Works
Proximity	Works
Power Sensor Sensor to monitor current, voltage and power. Not fuel gauge!	Works

Wingtech CMCC A1 (M623C)
	; CMCC A1 running Phosh console fastfetch
Manufacturer	Wingtech
Name	CMCC A1 (M623C)
Codename	wingtech-wt86621
Model	wt86621
Released	2015
Type	handset
Hardware
Chipset	Qualcomm Snapdragon 410 (MSM8916)
CPU	Quad-core 1.2 GHz Cortex-A53
GPU	Adreno 306
Display	720 x 1280
Storage	8 GB
Memory	1 GB
Architecture	aarch64
Software
Original software The software and version the device was shipped with.	Android Android 5.1
Extended version The most recent supported version from the manufacturer.	Android
FOSS bootloader	yes
postmarketOS
Category	testing
Pre-built images Whether pre-built images are available from the postmarketOS Installation page.	no
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.	yes
pmOS kernel The kernel version that runs on the device's port.	6.12.1
Unixbench score Unixbench Whetstone/Dhrystone score. See Unixbench.	0.0

This device has been tested with postmarketOS, but its device package has not yet been added to the postmarketOS repositories.
This means that it cannot be selected in pmbootstrap.