Performing manual testing and why it is important
While automated tests help to find bugs and issues, there are certain things they cannot cover that still require manual testing. When developing apps that make use of features such as a camera, Bluetooth, or other device capabilities, writing automated tests is hard and sometimes even impossible. In these scenarios, manual testing is necessary. This is especially important with connectivity features to see how your app handles unstable connections and whether your app still provides a good user experience, especially with varying connection quality. More importantly, testing using emulators makes it hard to verify how the app will feel on actual devices, especially when thinking about the user experience, such as elements being the right size and easily tappable on screens.
In addition to testing specific features that are hard to simulate as part of an automated test such as GPS or roaming data access, manual testing is also critical...