Here's an article (with video) from MIT Technology Review. It profiles the Samsung EEG Cap being used to control a tablet device. Voice commands in combination with the EEG cap allows the user to control the device with the need for any more traditional input device, including the not so new touch screen.
This is a bit behind in that you should be able to fully control the device without any need for voice control. It will also maintain your privacy over voice control which should be used in private not public. Most mobiles are used in public settings.
Whenever those that have the knowledge releases it then you should find true BMI mind controlled devices and there also would be no need for an ugly cap. Who really would be caught dead in public wearing such a thing? You could wirelessly control the device. The BMI tech will have to be tuned into your unique human frequency which we all have.
I put up some research links as this technology was mentioned in the Tell No Lies But Keep Secrets sci-fi.
The article's link: http://www.technologyreview.com/news/513861/samsung-demos-a-tablet-controlled-by-your-brain/