$ mkdir -p ~/twrp && cd ~/twrp
$ repo init --depth=1 -u git://github.com/minimal-manifest-twrp/platform_manifest_twrp_omni.git -b twrp-9.0
$ git clone https://github.com/topser9/twrp_device_samsung_a20.git device/samsung/a20
Sync
$ repo sync
$ export ALLOW_MISSING_DEPENDENCIES=true
$ . build/envsetup.sh
$ lunch omni_a20-eng
$ mka recoveryimage
`$ cd /out/target/product/a20`
see recovery.img
# Device Tree for Samsung Galaxy A20 (SM-A205F/DS)
Device Tree Made by topser99
|---------------------------------------------------------------------------------|
| Component | Specification |
|---|---|
| Dimensions | 158.4 x 74.7 x 7.8 mm (6.24 x 2.94 x 0.31 in) |
| Weight | 169 g (5.96 oz) |
| Type | Super AMOLED |
| Size | 6.4 inches, 100.5 cm2 (~85.0% screen-to-body ratio) |
| Resolution | 720 x 1560 pixels, 19.5:9 ratio (~268 ppi density) |
| OS | Android 9.0 (Pie), One UI |
| Chipset | Exynos 7884 (14 nm) |
| CPU | Octa-core (2x1.6 GHz Cortex-A73 & 6x1.35 GHz Cortex-A53) |
| GPU | Mali-G71 MP2 |
| Internal | 32GB 3GB RAM eMMC 5.1 |
| USB | USB Type-C 2.0, USB On-The-Go |
| Battery | Li-Po 4000 mAh, non-removable |
| charging | Fast charging 15W |
| Status | Available. Released 2019, April 05 |
| --------------------------------------------------------------------------------- |