1. You should have started a new thread for this question.
2. Post #2 is wrong. All PhoneCalls do is to create the exact same intent.
3. If you want to send an email with an intent then you need to use the Email object from Phone library.
4. Most of the intents are described here: http://developer.android.com/reference/android/content/Intent.html
Thanks Erel. I also made the post as a thread. and got a reply to it also which gave me the answer for sending an Email.. I had to use "mailto" in place of "tel"