Q: How can I set a custom sound for the notification?
A: For iOS you should include the custom sound file in the main bundle of the application, and use the “ios_sound”:”filename.xxx” parameter in the the createMessage API request. The file name should contain its extension (case sensitive).
For Android you should put the sound file in the “res/raw” folder of your project, and use the “android_sound”:”filename” parameter in the createMessage API request. Do not include the file extension.