> For the complete documentation index, see [llms.txt](https://guide.ssi.com.vn/ssi-products/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.ssi.com.vn/ssi-products/supplement-info/device-id.md).

# Device ID

Device ID is described as one of the following:  

* For applications running on mobile devices: Device ID can be IMEI, Serial, WLAN MAC, Android ID or other unique identifier of the device. 
* For applications running on desktop/laptop with operating systems (Linux, Windows, MacOS...): Device ID can be MAC or other identifier retrieved by API (Application Programming Interface) of operating system.