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Mobile Minutes: Mobile World Congress; Google in focus; Amazon free shipping; Good Morning America

Mobile World Congress, an annual event where some of the world's most innovative companies unveil new gadgets and discuss the future of connectivity, officially kicked off today in Barcelona.

Amazon.com Inc has raised its free-shipping threshold for orders from non-Prime customers to $49 from $35 in the United States.

The European Union is reviving a probe into Google?s advertising practices with an inquiry that adds to active EU antitrust investigations into the company?s mobile operating system and shopping search services.

ABC?s ?Good Morning America? is tapping into virtual-reality technology for ?GMA on Safari,? an immersive VR experience that it will air live from Africa.