The minimum version of Google Play Services required to use Firebase is 11.6.0. For more information, please refer to the official Google documentation (https://firebase.google.com/docs/android/setup).
In order to use features like Firebase Cloud Messaging, Firebase Authentication, and Firebase Realtime Database, the minimum version of Google Play Services is 12.0.0. For more information about the supported versions of Google Play Services for Firebase features, please refer to the official Firebase documentation (https://firebase.google.com/docs/android/setup#supported_versions).
If you are using Firebase on an Android device with a version of Google Play Services that is lower than 11.6.0, you will need to update it by going to the Google Play Store on the device. After that, you can test the app with Firebase features.