Hi Etienne,

Which part you could not understand?

1. If we don't use the "send_message_from_iframe" parameter to identify which situation Contacts app should post message to Dialer app, Contacts app will always post message to Dialer app. 

or

2. And I think we need to define a variable lives in recents.js and dialer.js to identify that. I think it will let the code more hard to understand. How do you think?

or

Totally NOT understand. XD