Cubot P20

cubot_P20

Cheap and cheerful

Specs

See here for specifications.

Treble

ships with Android oreo

Download GSI treble

Download arm64 (not binder) from

https://github.com/phhusson/treble_experimentations/wiki

https://github.com/eremitein/treble-patches/wiki/CAOS-Project

https://forum.xda-developers.com/project-treble/trebleenabled-device-development/gsi-lineageos-17-0-gsi-archs-t4004673

Uncompress image

xz -d lineage-17.1-20200808-UNOFFICIAL-treble_arm64_avN.img.xz

Unlock bootloader

Connect phone.

$ adb reboot bootloader
$ fastboot devices

$ fastboot flashing unlock

Accept using volume-UP on device. Device reboots. Then say OK. Enable adb then reboot to bootloader

Installing GSI treble

fastboot erase system
fastboot flash system  lineage-17.1-20200808-UNOFFICIAL-treble_arm64_avN.img

Very likely the complete 64GB space is NOT recognised.

• Reboot to recovery using

adb reboot recovery

or

Shutdown phone. Press and hold Volume UP and power

In the recovery menu:

• Wipe cache partition
• Wipe data/factory reset
• Restart phone