Not only does Google Voice still exist, but it's also adding new features. The service lets you call and text internationally for what should be cheaper rates than what your carrier charges. And starting today, if you have an iPhone or iPad, using Google Voice just became a lot simpler, and hands-free-er. Google has added support for Siri, which means that you can simply say Hey Siri, call John on Google Voice or something similar to, well, start a voice call. Or Hey Siri, send a message using Google Voice, if that's what you're after. To make this work you first have to go to...