If you were expecting Samsung to unveil the Galaxy S4 at Mobile World Congress in Barcelona this week, prepare to be disappointed: Samsung has instead sent out invitations to a press event in New York on March 14, where they will debut their much-anticipated (and iPhone 5 challenging) new smartphone.

In an attempt to go head-to-head with the likes of iMessage and BBM in emerging markets, social network Facebook has just announced that it will be allowing users of its Messenger app to send messages at free or heavily discounted data rates.

BARCELONA, MOBILE WORLD CONGRESS — Here at Mobile World Congress, ZTE is showing off the Grand Memo, its new super-sized smartphone that packs a giant 5.7-inch display. That’s 0.2 inches bigger than the Galaxy Note II’s display, and although that doesn’t sound much, it’s instantly recognizable when you pick up this handset for the first time.

BARCELONA, MOBILE WORLD CONGRESS -Mobile World Congress 2013 is now underway here in Barcelona, and there’s one device we couldn’t wait to get our hands on: the Galaxy Note 8.0 — Samsung’s answer to the iPad mini. In addition to its 8-inch display, the device boasts a 1.6GHz quad-core processor, 2GB of RAM, and of course, the Note’s trademark S Pen.

But can it give the iPad mini a run for its money?

BARCELONA, MOBILE WORLD CONGRESS – Quick: What’s better than one screen? Two screens, of course. Or so says NEC with its funky new Android 4.1-powered Medias Tab.