Problems you might encounter

Error calling AppRegistry.runApplication

Ensure that the debug server is running (react-native start)
Once it's running, RELOAD is sufficient

Unable to resolve module `react/lib/ReactDebugCurrentFrame`

Output from npm install: npm WARN react-native@0.44.0 requires a peer of react@16.0.0-alpha.6 but none was installed.
Resolution: npm install --save react@16.0.0-alpha.6

Could not connect to the development server when running on physical Android device

adb reverse tcp:8081 tcp:8081