You want to automate your mobile app testing on multiple devices and improve the efficiency of your testing process. Start by choosing a suitable test automation framework, such as Appium, which supports parallel testing on various mobile devices. Next, decide on the specific devices you want to run your tests on, considering factors like target users and device variety. Finally, upload your app and test scripts, choose the desired devices, start the test runs, and wait for the comprehensive results, including logs, screenshots, and videos. With automated testing, you can significantly reduce testing time, as tests will be run in parallel on multiple devices simultaneously, allowing you to value your testing time more efficiently.