diff --git a/device/testing/device-asus-tf300tg/APKBUILD b/device/testing/device-asus-tf300tg/APKBUILD
new file mode 100644
index 000000000..94cd75194
--- /dev/null
+++ b/device/testing/device-asus-tf300tg/APKBUILD
@@ -0,0 +1,66 @@
+# Maintainer: Svyatoslav Ryhel <clamor95@gmail.com>
+
+pkgname=device-asus-tf300tg
+pkgdesc="Asus Transformer Pad 3G TF300TG"
+pkgver=1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="armv7"
+options="!check !archcheck"
+depends="
+	alsa-ucm-conf
+	asus-transformer-blobtools
+	libvdpau-tegra
+	linux-postmarketos-grate
+	mesa-dri-gallium
+	mkbootimg
+	postmarketos-base
+"
+makedepends="devicepkg-dev"
+source="
+	deviceinfo
+	pointercal
+	rootston.ini
+"
+subpackages="
+	$pkgname-nonfree-firmware:nonfree_firmware
+	$pkgname-phosh
+	$pkgname-x11
+"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+
+	# osk-sdl touchscreen calibration
+	install -Dm644 "$srcdir"/pointercal \
+		"$pkgdir"/etc/pointercal
+}
+
+phosh() {
+	install_if="$pkgname=$pkgver-r$pkgrel postmarketos-ui-phosh"
+	install -Dm644 "$srcdir"/rootston.ini \
+		"$subpkgdir"/etc/phosh/rootston.ini
+}
+
+nonfree_firmware() {
+	pkgdesc="Asus Transformers WiFi & BT firmware"
+	depends="firmware-asus-transformer"
+	mkdir "$subpkgdir"
+}
+
+x11() {
+	install_if="$pkgname=$pkgver-r$pkgrel xorg-server"
+	depends="xf86-video-opentegra"
+	mkdir "$subpkgdir"
+}
+
+sha512sums="
+fe051ecca0a74dbde0195daed9602152fe20149d286694c3b37e03806f0fcf7700ed343cc2431c9ff92a8a19a0c4d9a0f7ef6478736f78de839239cda1f37b1a  deviceinfo
+d4270d13750b4c63a2f02a31ef42d00496ae71fc2c9cb8a7505da41d343911df353ff9150136f5cef143bf844024fee096f751ec0fa18589fae51dc30b1063c6  pointercal
+6ec993e278d2a73c72fb96f001716ded63543d99183847d22d172cd81ac410791c79370ecf391d0c24822c975d91b84dc1db296e1b28dbf66d5c227bff8d4011  rootston.ini
+"
diff --git a/device/testing/device-asus-tf300tg/deviceinfo b/device/testing/device-asus-tf300tg/deviceinfo
new file mode 100644
index 000000000..1b7cdb3af
--- /dev/null
+++ b/device/testing/device-asus-tf300tg/deviceinfo
@@ -0,0 +1,32 @@
+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="Asus Transformer Pad 3G TF300TG"
+deviceinfo_manufacturer="Asus"
+deviceinfo_codename="asus-tf300tg"
+deviceinfo_year="2012"
+deviceinfo_dtb="tegra30-asus-tf300tg"
+deviceinfo_append_dtb="true"
+deviceinfo_modules_initfs="i2c-hotplug-gpio asus-ec asus-dockram atkbd asus-ec-keys asus-ec-kbc asus-ec-battery asus-ec-charger lvds-codec panel-simple elants-i2c"
+deviceinfo_arch="armv7"
+
+# Device related
+deviceinfo_chassis="tablet"
+deviceinfo_keyboard="true"
+deviceinfo_external_storage="true"
+deviceinfo_screen_width="1280"
+deviceinfo_screen_height="800"
+
+# Bootloader related
+deviceinfo_flash_method="fastboot"
+deviceinfo_generate_bootimg="true"
+deviceinfo_bootimg_qcdt="false"
+deviceinfo_bootimg_blobpack="sign"
+deviceinfo_flash_offset_base="0x10000000"
+deviceinfo_flash_offset_kernel="0x00008000"
+deviceinfo_flash_offset_ramdisk="0x01000000"
+deviceinfo_flash_offset_second="0x00f00000"
+deviceinfo_flash_offset_tags="0x00000100"
+deviceinfo_flash_pagesize="2048"
+deviceinfo_flash_fastboot_max_size="760"
diff --git a/device/testing/device-asus-tf300tg/pointercal b/device/testing/device-asus-tf300tg/pointercal
new file mode 100644
index 000000000..ec3fd87ae
--- /dev/null
+++ b/device/testing/device-asus-tf300tg/pointercal
@@ -0,0 +1 @@
+37231 309 79480 91 37879 -381696 65536 1280 800 0
\ No newline at end of file
diff --git a/device/testing/device-asus-tf300tg/rootston.ini b/device/testing/device-asus-tf300tg/rootston.ini
new file mode 100644
index 000000000..4371cade4
--- /dev/null
+++ b/device/testing/device-asus-tf300tg/rootston.ini
@@ -0,0 +1,8 @@
+#[core]
+#xwayland=false
+
+[cursor:seat0]
+map-to-output:LVDS-1
+
+[output:LVDS-1]
+scale = 1