Each iOS device has a Unique Device Identifier (UDID), that helps automation engines to identify the specific device from the group of devices. The ID is the combination of letters and numbers that is specific to the device.

You can identify UDID from Simulator window or using the terminal.

To find the UDID of iOS device from the Simulator window:

1. Open the Simulator window.
2. On the Hardware menu, select Device and then point to Manage Devices.
3. Select the device in the left pane.
   Device Information is displayed in the right pane.
   Value displayed against Identifier is the UDID.
4. Qualitia users can add this identifier in the UDID field when Configuring Mobile Settings

To find the UDID of iOS device using terminal:

1. Lunch terminal.
2. Execute command, instruments -s devices.
   The list of devices are displayed.
3. Take the value for the desired device and add it in the UDID field when Configuring Mobile Settings.

UDID of Android device is nothing but the device name.

To identify the device name:

1. Launch the command prompt.
2. Execute command, adb devices -l.
   This will list all the devices connected to the computer with device details.
3. You can use the device name listed here when Configuring Mobile Settings.