Reminds me of this (not yet released?) concept, the GEAK ring: http://www.engadget.com/2013/06/17/geak-ring-nfc-finger/ http://www.engadget.com/2013/06/17/geak

Reminds me of this (not yet released?) concept, the GEAK ring: http://www.engadget.com/2013/06/17/geak-ring-nfc-finger/ http://www.engadget.com/2013/06/17/geak-ring-nfc-finger/ The "unlock your smartphone" use case is underlined here, too. Manufacturer's site (Chinese, can't read it myself): http://www.igeak.com/Ring http://www.igeak.com/Ring