Create faqs.md

docs/faqs.md

@@ -0,0 +1,53 @@
+# FAQs / Troubleshooting
+
+### Comparison to Firestack
+
+Firestack was a great start to integrating Firebase and React Native, however has underlying issues which needed to be fixed.
+A V3 fork of Firestack was created to help address issues such as lack of standardisation with the Firebase Web SDK, 
+and missing core features (crash reporting, transactions etc). The volume of pull requests with fixes/features soon became
+too large to manage on the existing repository, whilst trying to maintain backwards compatibility.
+
+RNFirebase was re-written from the ground up, addressing these issues with core focus being around matching the Web SDK as
+closely as possible and fixing the major bugs/issues along the way.
+
+### How do I integrate Redux with RNFirebase
+
+As every project has different requirements & structure, RNFirebase *currently* has no built in methods for Redux integration.
+As RNFirebase can be used outside of a Components context, you do have free reign to integrate it as you see fit. For example,
+with [`redux-thunk`](https://github.com/gaearon/redux-thunk) you dispatch updates to your store with updates from Firebase:
+
+```javascript
+class MyApp extends React.Component {
+
+  componentDidMount() {
+    this.props.dispatch(onAuthStateChanged());
+  }
+
+  ...
+}
+
+connect()(MyApp);
+```
+
+```javascript
+export function onAuthStateChanged() {
+  return (dispatch) => {
+    firebase.auth().onAuthStateChanged((user) => {
+      dispatch({
+        type: 'AUTH_STATE_CHANGE',
+        user,
+      });
+    });
+  };
+}
+```
+
+### [Android] Google Play Services is required to run this application but no valid installation was found
+
+The emulator/device you're using does not have the Play Services SDK installed. 
+
+- Emulator: Open SDK manager, under 'SDK Tools' ensure "Google Play services, rev X" is installed. Once installed, 
+create a new emulator image. When selecting your system image, ensure the target comes "with Google APIs".
+- Device: Play Services needs to be downloaded from the Google Play Store.
+
+