However, if your Surface Duo doesn’t turn on, you can also find the serial number on the SIM card tray after you eject it. This is the quickest way to find your serial number. In Settings, tap About > Model & hardware, and look for your Serial number. On this page, find Windows Specifications, and look for your Serial number. Select Start > Settings > System > About. Here's a quick way to find the serial number on your Surface (running on Windows 10): If you still have the original packaging for your Surface, you can find the serial number on the barcode label. Get the Surface app Find the serial number on the packaging
The Surface app isn’t available on Surface Duo or Windows RT. Note: If you have a Surface Duo, Surface RT, or Surface 2, use one of the other methods to find the serial number.
