Google on Wednesday began letting people use its Hangouts message application for mobile devices to make free or low-cost voice calls over the Internet. Hangouts already makes it easy to send a quick message, or start a group video chat, Google product manager Amit Fulay said in a blog post. But, sometimes it;s best to just call to say I love you, and with the new version of Hangouts you can. Google is essentially merging capabilities of its Voice online calling service with Hangouts, which became a hit feature in the technology titans Google+ social network because of its free group video chat capabilities.