This document discusses starting mobile testing and provides recommendations. It covers: - The key challenges of testing on different devices, platforms, OS versions, screen sizes, and networks. A diverse selection is important. - Creating a mobile app test strategy mindmap to map out the different aspects of diversity. - Choosing devices by considering the app's key features, market stats, optimal hardware and software configurations, and where devices can be obtained. Different tests require different devices. - Selecting mass market/top devices, most slow/poor devices, and vendor specific devices as recommendations.