I want to know what push mechanism does gmail, facebook or other common apps use in Windows Phone? Are they using MPNS only or something else (like MQTT). For example, Facebook is available for all platforms so whether they are using different protocols for different platforms or using a common approach.
I want to implement push notification for my app. The same app is being developed for other platforms like Android and iPhone also. So I want to use a mechanism which can be used across platforms.