URL Scheme to send facebook message on all devices

Facebook message is a good way to deliver the message. Email sometimes have delivery issue.

URL format: https://www.facebook.com/messages/{facebook-no}

iOS format: fb-messenger://user-thread/{facebook-no}

Android format: fb://messaging/compose/{facebook-no}

Here is the way to get facebook numeral id:

http://www.piliapp.com/what-is-my/facebook-id/