How to start a Google+ Hangout from android/mobile phone? So Google just released a new version of the Google+ app that has Hangout support. But how do I start a Hangout on my mobile phone?
That is actually not true.  As of yesterday you can.  Here are the instructions.

Make sure you have updated to the newest version of the G+ app. You should have version 2.3.1.242969 that came out yesterday.

From there you need to go to messenger and find the person you want to hangout with and send them a message. Once you send them a message you will see a hangout icon appear in the top right corner. See here for more information.