BARCELONA—Mobile World Congress has always been about phones. Though the world's largest trade show for mobile devices has embraced many other products and technologies over the last decade, phone ...

MWC is one of the biggest shows on planet when it comes to mobile phones, and usually it is a place where a myriad of new handsets get launched, all wanting to top the best camera phone list.

BARCELONA—Mobile World Congress has always been about phones.Though the world's largest trade show for mobile devices has embraced many other products and technologies over the last decade ...