Use regular expression to specify device attributes

You can use regular expressions (regex) to select devices to test on instead of providing specific device models in the deviceName (W3C protocol) or device (JSON wire protocol) capability and OS versions in the platformVersion (W3C protocol) or os_version (JSON wire protocol) capability.
Based on the regex you pass, an available device is allocated from the device pool that matches your specifications.
By widening your search through regular expressions, you get better test execution speed by reducing queuing and device tier limits.

The following code snippet demonstrates running a test on any Samsung Galaxy S series phone with an Android version between 10 and 12:

platforms:
  - platformName: android
    deviceName: Samsung Galaxy S.*
    platformVersion: 1[012]

platforms:
 - deviceName: Samsung Galaxy A52|Xiaomi Redmi Note 8
    platformVersion: 9.0|11.0
    platformName: android

DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("platformName", "android");
capabilities.setCapability("deviceName", "Samsung Galaxy S.*");
capabilities.setCapability("platformVersion", "1[012]");

var capabilities = {
    "platformName" : "android",
    "deviceName" : "Samsung Galaxy S.*",
    "platformVersion" : "1[012]",
}

AppiumOptions capabilities = new AppiumOptions();
Dictionary<string, object> browserstackOptions = new Dictionary<string, object>();
capabilities.AddAdditionalCapability("platformName", "android");
capabilities.AddAdditionalCapability("deviceName", "Samsung Galaxy S.*");
capabilities.AddAdditionalCapability("platformVersion", "1[012]");

desired_cap = {
    "platformName" : "android",
    "deviceName" : "Samsung Galaxy S.*",
    "platformVersion" : "1[012]",
}

capabilities = {
    "platformName" => "android",
    "deviceName" => "Samsung Galaxy S.*",
    "platformVersion" => "1[012]",
}

DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("platform", "android");
capabilities.setCapability("device", "Samsung Galaxy S.*");
capabilities.setCapability("os_version", "1[012]");

var capabilities = {
    "platform" : "android",
    "device" : "Samsung Galaxy S.*",
    "os_version" : "1[012]",
}

AppiumOptions capabilities = new AppiumOptions();
Dictionary<string, object> browserstackOptions = new Dictionary<string, object>();
capabilities.AddAdditionalCapability("platform", "android");
capabilities.AddAdditionalCapability("device", "Samsung Galaxy S.*");
capabilities.AddAdditionalCapability("os_version", "1[012]");

desired_cap = {
    "platform" : "android",
    "device" : "Samsung Galaxy S.*",
    "os_version" : "1[012]",
}

desired_caps = {
    "platform" => "android",
    "device" => "Samsung Galaxy S.*",
    "os_version" => "1[012]",
}

To run tests on a single device from a pool of devices, see Run Tests on a Single Device on App Automate