You can use Behat with Selenium and Sauce to test mobile devices in the cloud. To start, create a Sauce Labs account and obtain your personal username and API key. Configure your Behat tests to use Sauce Labs by installing the Mink Extension and specifying the desired capabilities for your browser, OS, and device. You can then run your tests on iOS and Android devices using the `behat -p` command, and generate HTML reports to visualize your test results. Additionally, you can use Apache ANT to run all your feature files in one go. The source code and usage instructions are available on GitHub. With Behat, Mink Extension, and Sauce Labs, mobile test automation is becoming more accessible and simpler.