GPS - enabled walking was among the usual uses for mobile technology on display at Mobile World Congress in Tokyo . Other gadgets included the YotaPhone , a device featuring both a color touch screen and a screen using low - power monochome e - ink . Mitten - ready mobiles , robotic balls and temperature - sensitive devices were also on display .
GPS-enabled walking stick among the usual uses for mobile technology on display at Mobile World Congress in Barcelona . Other gadgets included the YotaPhone , a device featuring both a color touch screen and a screen using low-power monochome e-ink . Mitten-ready mobiles , robotic balls and temperature-sensing microchips were also on display .