To achieve confidence for their mobile SDKs, developers can use Sauce Labs Real Device Cloud (RDC) and GitHub Actions to run Espresso tests on real mobile devices. Sauce Labs provides a vast number of real mobile devices accessible by developers to test their apps across all Android phones in the wild. Developers can configure their repo for saucectl, a tool used to access RDC, and define testing framework, data center region, app paths, and real phone specifications. They can then use GitHub Actions to run these tests automatically on push, connecting to RDC with their Sauce credentials. By using this approach, developers can ensure their apps run without bugs on any device, covering the vast number of Android devices used worldwide.