diff --git a/device/testing/device-microsoft-dempsey/APKBUILD b/device/testing/device-microsoft-dempsey/APKBUILD
new file mode 100644
index 000000000..251ad15e8
--- /dev/null
+++ b/device/testing/device-microsoft-dempsey/APKBUILD
@@ -0,0 +1,33 @@
+# Maintainer: Ermine <mustela@erminea.space>
+pkgname=device-microsoft-dempsey
+pkgdesc="Microsoft Lumia 640 LTE Dual Sim"
+pkgver=1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="armv7"
+options="!check !archcheck"
+depends="
+	linux-postmarketos-qcom-msm8226
+	lk2nd-msm8226
+	mkbootimg
+	postmarketos-base
+"
+makedepends="devicepkg-dev"
+source="
+	deviceinfo
+	modules-initfs
+"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+}
+
+sha512sums="
+853a0695225d0dd464a84ab343b3f34b6b93cf1a2148daf20a859ec0f491bae627e1e28748d62d345214cc71cd49d1c6dd4a0e21787a4b9428b77b33039989eb  deviceinfo
+62d380a05828ec2cf180c0fcc105c7cf492f709fed086b37a093cacadf19ee7a4ca035db238c5d2e3f1f5e4f1d928248d6f1d7957430bb2cb8529e52c773429a  modules-initfs
+"
diff --git a/device/testing/device-microsoft-dempsey/deviceinfo b/device/testing/device-microsoft-dempsey/deviceinfo
new file mode 100644
index 000000000..e770d5aac
--- /dev/null
+++ b/device/testing/device-microsoft-dempsey/deviceinfo
@@ -0,0 +1,23 @@
+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell
+# scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="Microsoft Lumia 640 LTE Dual Sim"
+deviceinfo_manufacturer="Microsoft"
+deviceinfo_codename="microsoft-dempsey"
+deviceinfo_year="2015"
+deviceinfo_dtb="qcom-msm8226-microsoft-dempsey"
+deviceinfo_arch="armv7"
+
+# Device related
+deviceinfo_chassis="handset"
+deviceinfo_external_storage="true"
+
+# Bootloader related
+deviceinfo_flash_method="fastboot"
+deviceinfo_kernel_cmdline="debug"
+deviceinfo_generate_bootimg="true"
+deviceinfo_flash_pagesize="2048"
+deviceinfo_dtb_second="false"
+deviceinfo_append_dtb="true"
diff --git a/device/testing/device-microsoft-dempsey/modules-initfs b/device/testing/device-microsoft-dempsey/modules-initfs
new file mode 100644
index 000000000..d6e4829f9
--- /dev/null
+++ b/device/testing/device-microsoft-dempsey/modules-initfs
@@ -0,0 +1 @@
+rmi4_i2c