[[https://www.techaccent.com/best-secret-code-android-os-dial-4636/|
*#*#4636#*#* Android Usage Information]]


[[https://itsfoss.com/open-source-alternatives-android/|Open Source Mobile OS Alternatives To Android]]


[[https://en.wikipedia.org/wiki/HarmonyOS|HarmonyOS]]

HarmonyOS (HMOS) (Chinese: 鸿蒙; pinyin: Hóngméng) is a distributed operating system developed by Huawei to collaborate and interconnect with multiple smart devices on the Internet of Things (IOT) ecosystem. In its current multi-kernel design, the operating system selects suitable kernels from the abstraction layer for devices with diverse resources.For IoT devices, the system is known to be based on LiteOS kernel; while for smartphones and tablets, it is based on a Linux kernel layer with AOSP compatibility libraries to support legacy APK apps, in addition to native HarmonyOS HAP apps via the Ark Compiler.


[[https://en.wikipedia.org/wiki/OpenHarmony|OpenHarmony]]

OpenAtom OpenHarmony, or abbreviated as OpenHarmony (OHOS), is an open-source version of HarmonyOS donated by Huawei to the OpenAtom Foundation. Similar to HarmonyOS, the open-source operating system is designed with a layered architecture, which consists of four layers from the bottom to the top, i.e., the kernel layer, system service layer, framework layer, and application layer.

[[https://en.wikipedia.org/wiki/Android_(operating_system)|
Android (operating system)]]


[[https://en.wikipedia.org/wiki/EulerOS|EulerOS]]

EulerOS is a commercial Linux distribution developed by Huawei for enterprise applications.[2] First released on September 24, 2021 as OpenEuler 21.09 which was launched in the community on September 30, 2021.[3]